JPH06110565A - Power supply voltage adaptive controller - Google Patents

Abstract

PURPOSE:To confirm/adjust the operation of a machine by temporarily utilizing the power source of 100V even in the case of a high-speed copy machine using 200V as an exclusive power source. CONSTITUTION:A fixing device heater lamp HL is composed as the serial body of first and second heater lamps HL1 and HL2, and a relay contact ry is interposed parallelly to the second heater lamp HL2. A first changeover switch SW1 is provided for keeping a supply voltage to a second-order side coil constant even when a commercial power source 1 is changed from 200V to 10-V. A second changeover switch SW2 interlocked with this first changeover switch SW1 outputs a monitor signal MS to a microcomputer 5 when it is switched to the 100V side. The microcomputer 5 turns on the relay contact ry by exciting a relay coil RY corresponding to the input of the monitor signal MS, the heat generating state of only the first heater lamp HL1 is provided by short-circuiting the second heater lamp HL2, and the quantity of generated heat is made correspondent to 100V.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is incorporated in a high-speed copying machine using a 200V power source as a dedicated power source, and automatically adjusts the power supplied to a fixing device heater lamp in accordance with the power source voltage supplied from an outlet. For controlling the mechanically.

[0002]

2. Description of the Related Art In a general high speed copying machine, the amount of heat supplied from a heater lamp in a fixing device tends to be insufficient due to the process speed and the number of copies. Therefore, in the case of a high speed copying machine, 20
By using the 0V specification model, the power P = IE
From the relationship of (W), the machine power is doubled to cope. Of course, DC power supplies other than the fixing device are also 200
It is a V-only machine, and the main body specification is a 200-V dedicated machine.

[0003]

[Problems to be Solved by the Invention] However, 100
When using this high-speed copying machine as a 200V-dedicated machine in the V region, a 200V-dedicated power supply is required, and power supply work is being performed to secure the power supply from the single-layer 3-wire 200V line. Also, 200V power must be supplied to perform machine adjustment and operation check.

High speed copying machines are large and heavy. It is also necessary to carry out such a large and heavy machine, unpack it, and install it after power supply construction at the user's site, and then check in that case. In the case of a copying machine, there are many mechanisms and there are many initial adjustments and confirmation adjustment items during installation.
The time required for installation is naturally long, and it tends to be a day-long work. Further, even if the machine is repaired or reworked, it cannot be operated without a 200V power supply, and a simple repair or confirmation by rework cannot be performed.

The present invention was devised in view of such circumstances, and a high-speed copying machine, which is a 200V-dedicated machine, operates with a temporary 100V power supply even when there is no 200V power supply. The purpose is to enable confirmation and adjustment.

[0006]

A first power supply voltage adaptive control apparatus according to the present invention is a power supply voltage adaptive drive for temporarily driving a high-speed copying machine using a 200 V power supply as a dedicated power supply with a 100 V power supply during operation confirmation / adjustment. The controller is a first changeover switch that is changed over so as to keep the supply voltage to the secondary load constant when the 200V power source is changed over to the 100V power source, and is linked to the first changeover switch. The current power supply to the microcomputer is switched to 200V
A second changeover switch for providing a monitor signal indicating whether the power supply is 100 V or a 100 V power supply and one for a 200 V power supply connected to the primary side
And a fixing device heater lamp for the 00V power source. When the microcomputer detects that the second changeover switch is on the 200V power source side, the microcomputer switches the heater lamp for the 200V power source and the second switch. The heater lamp is configured to be switched to the 100V power source when it is detected that the selector switch has been switched to the 100V power source side.

The second power supply voltage adaptive control device according to the present invention is a power supply voltage adaptive control device for temporarily driving a high speed copying machine using a 200V power supply as a dedicated power supply with a 100V power supply at the time of operation confirmation / adjustment. From a 200V power supply to 100
A first changeover switch which is changed over so as to keep the voltage supplied to the secondary load constant when the power source is changed over to the V power supply, and a microcomputer which is changed over in conjunction with the first changeover switch so that the current power supply is supplied to the microcomputer. Is a 200V power supply or 1
The microcomputer is provided with a second changeover switch for giving a monitor signal indicating whether it is a 00V power source and a fixing device heater lamp connected to the primary side through a triac, and the microcomputer has the second changeover switch for the 200V power source side. When it is detected that the conduction angle of the phase control for the triac is set small for 200V, and when it is detected that the second changeover switch is switched to the 100V power source side, the conduction angle for the triac is set to 10V.
It is characterized in that it is configured to be set large for 0V.

[0008]

According to the first power supply voltage adaptive control device, the microcomputer is set to 1 depending on the state of the second changeover switch.
When the 00V power source is detected, the fixing device heater lamp is automatically switched to the 100V power source to adjust the amount of heat generated by the fixing device to a state adapted to the 100V power source. Therefore, the high speed copying machine using the 200V power source as a dedicated power source. Even in this case, the operation check / adjustment can be performed by temporarily using the 100V power supply.

Further, according to the second power supply voltage adaptive control device, when the microcomputer detects the 100V power supply by the state of the second changeover switch, the microcomputer sets a large conduction angle of the phase control for the triac to 100V. , The electric power supplied to the heater lamp is automatically adjusted to a state adapted to the 100V power source.
Even if it is a high-speed copying machine that uses the V power supply as a dedicated power supply,
It becomes possible to confirm and adjust the operation by temporarily using the V power supply.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a power supply voltage adaptive control device in a high speed copying machine according to the present invention will be described in detail below with reference to the drawings.

First Embodiment FIG. 1 is a circuit diagram showing a general power supply circuit in a high speed copying machine using a 200 V power supply as a dedicated power supply. In the figure,
Reference numeral 1 is a commercial power supply of 100 V or 200 V, 2 is a main power switch, 3 is a fuse, A is a large-capacity load portion directly driven by a primary power supply, HL is a fixing device heater lamp, and TAC is a triac. . B is a voltage conversion unit, which is configured by a step-down power supply transformer 4. P
Is a primary winding, and S1 to S3 are secondary windings. In addition,
The voltage conversion unit B may be composed of a switch power supply.
DB1 to DB3 are full-wave rectifiers composed of diode bridges, and C1 to C3 are smoothing capacitors, which perform AC-DC conversion. E1 to E3 are stabilized DC power supplies, a DC power supply E1 outputs a machine control power supply voltage VD1, and a DC power supply E2 is a display power supply voltage VD.
C output, DC power supply E3 outputs mechanical control power supply voltage VB such as solenoid and clutch, full-wave rectifier DB3
The DC power supply voltage by the smoothing capacitor C3 and the smoothing capacitor C3 is output as the power supply voltage VH for the machine drive motor, the high voltage transformer, and the like. The highest voltage among these is the power supply voltage VH, which is still a low voltage of 42 V or less. These stabilized DC power supplies E1 to E3 are commercial power supplies 1
The power supply voltages VD1, VC, VB and VH to be output have the same value regardless of whether the voltage is 200V or 100V. In other words, the power required for the secondary load is the same for both the 100V specification and the 200V specification, and even if the 200V specification is used, there is no particular merit due to increased power.

Heat is supplied to the fixing device by the heater lamp HL in the large-capacity load section A. However, in the case of a high-speed copying machine, the process speed is high and the number of copies is large.
The heat supply to the paper tends to be insufficient. In order to deal with this, the electric power supplied to the heater lamp HL is increased to supply a larger amount of heat. That is, even if the amount of heat per sheet is the same, since the copying speed is high, the fixing device always requires a sufficient amount of heat. As a means for increasing the electric power, a method of obtaining double electric power by doubling the voltage of E by electric power P = IE · (W). That is, in the case of the 200V system, it is possible to supply twice the electric power of the 100V system.

According to the present invention, only the large-capacity load section A of the high-speed copying machine using the 200V power source as a dedicated power source is temporarily 100V.
It is designed so that it can be used with a power outlet. Two
For the voltage converter B for the secondary load, the commercial power source 1
When the voltage is 200V and 100V, the secondary winding S1
The same voltage is supplied to S3. Therefore,
As shown in FIG. 2, a 100V tap is connected in the middle of the primary winding P of the step-down power transformer 4 of the voltage conversion unit B,
A first changeover switch SW1 having one end of the primary winding P and a 100V tap as a transfer contact is inserted between the fuse 3 and the fuse 3. Commercial power supply 1 is 200V to 100
In response to the change to V, the first changeover switch SW1 is set to 1
Switch to the tap side for 00V. The primary voltage before switching is 200V, the primary voltage after switching is 100V,
It becomes 1/2. However, assuming that the number of turns of the primary winding P before switching is 1, the number of turns after switching is ½, so that the voltage induced in the secondary windings S1 to S3 of the step-down power transformer 4 is When the commercial power supply 1 is 200V and 100V
It is the same as when.

Second interlocking with the first changeover switch SW1
Of the changeover switch SW2, the transfer contact thereof is set to the ground GND and the machine control power supply voltage VD1, and the common terminal is connected to the microcomputer 5. When the commercial power source 1 is 200 V, the second changeover switch SW2
Is on the ground GND side, and the monitor signal MS sent from the changeover switch SW2 to the microcomputer 5 is at "L" level.

When the commercial power source 1 is at 100V, the second changeover switch SW2 is switched to the machine control power source voltage VD1 side, so that the monitor signal MS to the microcomputer 5 becomes "H" level. Microcomputer 5
Determines whether the changeover switches SW1 and SW2 and thus the commercial power supply 1 are switched to 200V or 100V according to whether the monitor signal MS is at "L" level or "H" level, and depending on the determination result. As described below, the heat generation amount of the fixing device heater lamp HL in the large-capacity load portion A is switched and the flow in the control program is switched.

The fixing device heater lamp HL connected through the triac TAC has a power supply of 200V and a power supply of 100V.
It is divided into for power supply. That is, as shown in FIG. 2, the first heater lamp HL1 and the second heater lamp HL2 are connected in series, and the second heater lamp HL1 and the second heater lamp HL2 are connected in series.
A normally open relay contact ry is connected in parallel to the heater lamp HL2. The relay contact ry is interlocked with the relay coil RY that is driven when the microcomputer 5 inputs the "H" level as the monitor signal MS.
The drive power supply for the relay coil RY is the mechanical control power supply voltage VB. To the triac TAC, a surge voltage absorbing absorber 6 in which a resistor and a capacitor are connected in series is connected in parallel.

The resistance value of the first heater lamp HL1 and the second value
The heater lamp HL2 and the heater lamp HL2 have the same resistance value. For example, it is assumed that both heater lamps HL1 and HL2 consume 2000 W at 200 V. From power P = IE · E = E ² / R, R = E ² / P = 2
The 00 ^2/2000 = 20Ω. Since this is the combined resistance value of both heater lamps HL1 and HL2, both the first heater lamp HL1 and the second heater lamp HL2 are 1
It becomes 0Ω.

[1] Operation at 200V When 200V is used as the commercial power supply 1, the interlocked first and second changeover switches SW1 and SW2 are set to the upper side in the figure. Then, since the monitor signal MS for the microcomputer 5 is at "L" level, the microcomputer 5 keeps the output port for the relay coil RY at "H" level and keeps the relay coil RY in the demagnetized state. Therefore, the relay contact ry remains open,
Both heater lamps HL1 and HL2 are connected in series, and the state is 2000 W.

Further, the microcomputer 5 executes a normal copying flow.

[2] Operation at 100V When 100V is used as the commercial power supply 1, both changeover switches SW1 and SW2 are switched to the lower side of the figure. The voltage supplied to the secondary windings S1 to S3 does not change even if the voltage is switched from 200V to 100V. When the second selector switch SW2 is switched to the lower side, the monitor signal MS to the microcomputer 5 is "H".
The level is reversed, and the microcomputer 5 switches the output port for the relay coil RY to the “L” level. Therefore, a current flows through the relay coil RY to be excited, and the relay contact ry is closed. As a result, the second heater lamp HL2 is short-circuited via the relay contact ry. The excitation of the relay coil RY is performed before the triac TAC is turned on.

As a result of the closing of the relay contact ry, the state in which current flows in both heater lamps HL1 and HL2 is switched to the state in which current flows only in the first heater lamp HL1. The voltage applied to the first heater lamp HL1 via the triac TAC is 100V, and the resistance value of the first heater lamp HL1 is 10Ω.
Power ^{consumed, P = E 2 / R =} 100 2/10 = 1
It becomes 000W. That is, 20 at 200V in [1]
It is 1/2 that of 00W. The value of the current I is 1
The same applies to the case of 00V and 200V, and even if the 200V dedicated machine is used at 100V, the fuse 3 will not be blown. Also, the breaker does not fall.

By the way, since the electric power is halved, the warm-up time of the high speed copying machine needs to be nearly doubled. Also, since the normal copying is performed, the power supply becomes insufficient.

Therefore, the trouble timer presets for them are automatically changed when the microcomputer 5 inputs the "H" level monitor signal MS,
At the same time, the number of multi-copy inputs shall be reset according to the machine capability.

As described above, at the time of confirming and adjusting the operation of a high speed copying machine which is a 200V dedicated machine, even if there is no 200V power source, wherever there is a 100V power source, the 100V power source can be used. It is possible to check and adjust the operation temporarily by using, and it is possible to check the trouble that may occur at the time of delivery to the user in advance and prevent it from occurring. In addition, it is possible to check by repair or rework. These are very advantageous in terms of sales activities and after-sales service at dealers and the like.

The first heater lamp HL1 and the second heater lamp HL2 may be connected in parallel, and a normally open relay contact ry may be interposed therebetween. In this case, 200V
Sometimes only the first heater lamp HL1 is used and 100V
Sometimes the relay contact ry is turned on and both heater lamps HL
1, HL2 is used.

Second Embodiment In the second embodiment, the electric power supplied to the fixing device heater lamp is adjusted by phase control. Phase control is performed by a triac T connected in series with the heater lamp HL.
It is performed by adjusting the conduction angle with respect to AC. Therefore,
In the case of the second embodiment, it is not necessary to divide the heater lamp HL into two as in the first embodiment, and the relay contact r
Neither y nor the relay coil RY is required. In addition, a 100V tap is provided on the primary winding P, and the first
And second changeover switches SW1 and SW2 are provided,
The point that the changeover switch SW2 of 1 is connected to the microcomputer 5 is the same as in the first embodiment.

[1] Operation at 200V When 200V is used as the commercial power supply 1, both changeover switches SW1 and SW2 are set to the upper side of the figure, so that the monitor signal MS becomes "L" level and the microcomputer 5 Then, it is determined that the power source is currently 200V, and a gate signal is output to the triac TAC at a timing adapted to the 200V power source to turn on the triac TAC, and the fixing device heater lamp HL is energized. Further, the microcomputer 5 executes a normal copying flow.

In the case of a general incandescent light bulb (halogen lamp), the electric power is determined in proportion to the 1.54th power of the voltage E.
That is, assuming that the power at the voltage E ₀ is P ₀ and the power at the voltage E ₁ is P ₁ , there is a relationship of P ₁ / P ₀ = (E ₁ / E ₀ ) ^1.54 . For example, 1000 with 100V power supply
It is assumed that the heater lamp HL outputs W electric power, and the heater lamp HL is caused to output 2000 W, which is twice as much. When the effective value E ₀ of the power supply voltage at that time is calculated according to the above equation, it is 1000/2000 = (100 / E ₀ ) ^1.54 . From this, when the voltage E ₀ for outputting 2000 W is calculated, E ₀ ≈156 It becomes 0.8V. Fig. 3 shows the symmetric full-wave phase control characteristic. When the trigger point is obtained from this characteristic diagram, it is about 63-
When the triac TAC is triggered at the point α advanced by 66 °, a voltage of effective value 156.8V is applied to the heater lamp HL, and the heater lamp H is supplied at the 200V power source.
L is rated at 2000W. The conduction angle when the trigger phase angle is α is 2 × (180−α), which is smaller than that at 100 V described later.

Since the lamp life is proportional to the 12th to 14th power of the voltage, the lamp life and rating are 200V.
It should be decided based on the use, and 100V use should be considered as a temporary simulation support.

[2] Operation at 100 V When 100 V is used as the commercial power supply 1, both changeover switches SW1 and SW2 are switched to the lower side of the figure. The supply voltage to the secondary windings S1 to S3 does not change. Monitor signal M
Since S is inverted to the “H” level, the microcomputer 5 judges that the power supply has been switched to 100V and
A gate signal is output to the TRIAC TAC at a timing adapted to the V power supply. In the case of the above calculation example, since the electric power may be set to 1000 W which is ½, the triac TAC is triggered at the phase angle of 0 ° and the heater lamp H
Full power may be applied to L. Trigger phase angle α
Since = 0, the conduction angle is 360 °.

As in the case of the first embodiment, since the power is reduced to 1/2, the warm-up time of the high-speed copying machine needs to be nearly doubled, and the power supply becomes insufficient even in normal copying. , The trouble timer presets for them are automatically changed when the microcomputer 5 inputs the "H" level monitor signal MS, and the number of multi-copy inputs is reset according to the machine capability. To do.

As described above, even a high-speed copying machine for a 200-V dedicated machine can be temporarily driven by a 100-V power supply, so that even if there is no 200-V power supply and only a 100-V power supply, the operation of the high-speed copying machine can be checked and adjusted. It can be performed.

The present invention may be applied to a high speed printer.

[0034]

According to the first power supply voltage adaptive control apparatus of the present invention, when the power supply is switched to 100V, the state of the fixing device heater lamp is changed from 200V power supply to 100V power supply.
Change the amount of heat generated by the fixing device by switching to power
Since it automatically adjusts to the state adapted to the 0V power source, 20
Even a high-speed copying machine that uses a 0V power source as a dedicated power source
It is possible to easily check and adjust the operation by temporarily using the 0V power supply.

According to the second power supply voltage adaptive control device of the present invention, when the power supply is switched to 100V,
The conduction angle of the phase control for the triac is set large for 100V, and the power supplied to the heater lamp is set to 10%.
Since the automatic adjustment is made to the state adapted to the 0V power source, even in the 200V dedicated machine, the operation confirmation / adjustment can be easily performed using the 100V power source as in the above.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a general power supply circuit in a high speed copying machine using a 200 V power supply as a dedicated power supply.

FIG. 2 is a circuit diagram showing a changeover switch, a microcomputer and a fixing device heater lamp of a power supply voltage adaptive control device in a high speed copying machine using a 200 V power supply as a dedicated power supply according to the first embodiment of the present invention.

FIG. 3 is a graph showing a symmetrical full-wave phase control characteristic used in the second embodiment of the present invention.

[Explanation of symbols]

 1 Commercial power supply 4 Step-down power supply transformer 5 Microcomputer A Large capacity load part B Voltage conversion part HL Fixing device heater lamp HL1 First heater lamp HL2 Second heater lamp SW1 First changeover switch SW2 Second changeover switch MS Monitor signal RY Relay coil ry Relay contact E1 to E2 Stabilized DC power supply TAC Triac

Claims (2)

[Claims] 1. A power supply voltage adaptive control device for temporarily driving a high speed copying machine using a 200 V power supply as a dedicated power supply with a 100 V power supply at the time of operation confirmation / adjustment.
A first changeover switch which is changed over to keep the supply voltage to the secondary load constant with the changeover to the 00V power source, and a microcomputer which is changed over in conjunction with the first changeover switch to present power source to the microcomputer. Second switch that gives a monitor signal indicating whether the power source is 200V power source or 100V power source, and a 200V power source and 100V voltage source connected to the primary side
It is equipped with a fixing device heater lamp divided into one for power supply,
When the microcomputer detects that the second changeover switch is on the 200V power supply side, it switches the heater lamp for the 200V power supply and when it detects that the second changeover switch is changed to the 100V power supply side. A power supply voltage adaptive control device, characterized in that the heater lamp is configured to be switched to a power supply of 100V. 2. A power supply voltage adaptive control device for temporarily driving a high-speed copying machine using a 200 V power supply as a dedicated power supply with a 100 V power supply at the time of operation confirmation / adjustment.
A first changeover switch which is changed over to keep the supply voltage to the secondary load constant with the changeover to the 00V power source, and a microcomputer which is changed over in conjunction with the first changeover switch to present power source to the microcomputer. Is provided with a second changeover switch for giving a monitor signal indicating whether the power source is 200V power source or a 100V power source, and a fixing device heater lamp connected to the primary side via a triac, and the microcomputer has the second changeover switch. When it is detected that the power supply is on the 200V power supply side, the conduction angle of the phase control for the triac is set small for 200V, and when it is detected that the second changeover switch is switched to the 100V power supply side, the conduction angle for the triac is set. 1
A power supply voltage adaptive control device, which is configured to be set to a large value for 00V.