JPS6215615A - Power controller - Google Patents

Abstract

PURPOSE:To ensure the complete working and to save the electric power with a power controller by detecting the start or the working of an electrical equipment at the side of an automatic vending machine and transmitting a voltage rise command to the power controller main body with superposition on a cable. CONSTITUTION:When a relay switch 44 is closed in a start mode of a motor, a detector 54 opens for a short time and the pulse voltage is superposed on a cable 30 to reach a power controller main body 28. This main body 28 detects the pulse voltage sent from an automatic vending machine 26 and minimizes the phase control angle of a trigger circuit 84 for a prescribed period of time decided by a timer 82. Thus the output of a thyristor 78 is raised up to 100V and therefore the approximately full 100V is impressed to a load. As a result, the sufficient voltage is applied to an induction motor 36 for smooth start. The the thyristor 78 is reset to a power saving phase angle stage.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention is a power controller, in particular, a thyristor device provided between a power source and a load-side electrical device to reduce the power supply voltage to the load-side electrical device. This invention relates to a power controller that supplies W1 power, controls dimming, and controls rotation.

[Prior Art] Conventionally, power control using thyristor devices such as SCR, triac, and GTO includes rotation control and on/off control of electric motors, dimming of lighting equipment, and the like.

In recent years, attempts have also been made to use thyristor devices to save power in lighting equipment and motors in order to more effectively utilize energy resources and save power costs.

``Problem to be solved by the invention'' However, when applying a voltage lowered by a thyristor to the power supply voltage in order to save power and control light in fluorescent lamp equipment, for example, in an ordinary glow-in-tube fluorescent lamp, when the initial light is turned on, There was a problem that the filament was not heated enough and the kick voltage was insufficient, making it difficult to turn on the light.

In addition, when trying to save power or control the rotation of an electric motor, for example, when operating an induction motor with a mechanical load material that has a heavy starting load torque, applying a voltage lower than the predetermined power supply voltage will reduce the effective power at startup. There have been problems in which the engine does not start up smoothly due to insufficient power, or a rotation lock phenomenon occurs due to the balance between rotational torque and load torque, causing difficulty in starting up.

Furthermore, on the load side of the thyristor device, for example, in addition to a fluorescent lamp that is targeted for power saving, other electrical equipment that is not targeted for power saving is installed in parallel, and when the other electrical equipment is operated or performs a specific operation, the power supply voltage is lower than the power supply voltage. There are disadvantages in that a dropped voltage may lead to malfunction, and when a resistive load that is not targeted for power saving is operated, the phase angle of the SIRISK device shifts and the amount of voltage drop changes.

The present invention eliminates such conventional drawbacks and ensures smooth startup or normal operation of electrical equipment connected to the load side of the thyristor device, and further improves power saving, dimming, and It is an object of the present invention to provide a power controller with a simple configuration that can reliably perform power control such as rotation control.

"Means for Solving the Problems" The power controller according to the present invention includes a power receiving voltage variable necessary timing detecting means for detecting when the power receiving voltage should be increased or decreased, which is provided in a load-side electric device; It includes a power supply voltage variable command transmitting means for generating and transmitting a command to increase or decrease the power supply voltage to the power supply side based on the detection signal of the power supply voltage variable necessary timing detection means, and a thyristor, which is connected to the load side via a power cable. A voltage raising/lowering means connected to the electric base Ia and capable of raising and lowering the power supply voltage; and a power supply voltage variable command receiving means provided on the side of the voltage raising/lowering means for receiving a power supply voltage variable command and outputting it to the voltage raising/lowering means to raise and lower the voltage. It is equipped with.

That is, in the basic configuration block diagram of the present invention shown in FIG. 1, a power controller main body 10 is equipped which receives power E from a commercial power source or a private generator. This power controller main body 10 performs dimming/rotation control φ power saving of the load-side electrical equipment 20, and is composed of a voltage raising/lowering device 14 including a thyristor 12, and a voltage variable command receiving device 16.

As the thyristor 12, various power control thyristors such as SCR, TRIAC, and GTO can be used.
A trigger circuit (phase control circuit) normally lowers the voltage of the power source E to a predetermined voltage and outputs the voltage.

When a command is received from the voltage variable command receiving device 1B, the phase angle by the trigger circuit is varied to increase or decrease the output voltage, or the thyristor 12 is short-circuited to reduce the power supply voltage E.
By outputting as is, the output voltage is increased.

The voltage variable duration time is a predetermined fixed time after receiving the variable command, or the time during which the variable command continues.

The voltage variable command receiving device 1B receives the voltage variable command from the load side in a form superimposed on the power cable 18 or in a form transmitted through space such as radio waves, light, and ultrasonic waves. The signal format is not particularly limited, and may be a pulse signal, or various modulation signals such as AM, FM, or PCM.

A load-side electric device 20 is connected to the output side of the power controller body 10 via a power cable, and is supplied with power.

The load-side electrical equipment 20 may be equipped with a single fluorescent lamp or an electric motor, or may be equipped with a plurality of electrical equipment including fluorescent lamps or electric motors in parallel.

The load-side electrical equipment 20 is also provided with a power supply voltage variable necessity timing detection device 22 . This power supply voltage variable necessity timing detection device 22 detects the starting operation of a fluorescent lamp or an electric motor, or detects the operation of equipment or a specific operation that may cause malfunction if it receives a voltage drop from the power supply E. ,
When operated, such as a heater load, the phase angle of the thyristor changes and the operation of a device that changes the receiving voltage is detected.

How to detect when it is necessary to change the power supply voltage is by detecting the opening and closing of the power switch of electrical equipment, by detecting changes in the current voltage reference rotation speed during startup operation, or by detecting the timing at the start or end of a specific operation of the equipment. The accompanying state change may be detected by a predetermined detector.

A power supply voltage variable command transmitting device 24 is provided on the output side of the power supply voltage variable necessity timing detection device 22 .

This power supply voltage variable command transmitting device 24 generates a power supply voltage increase command or decrease command determined in advance for each detection signal when or while a detection signal is input from the detection device 22, and outputs a predetermined signal. Power cable 18 depending on the form
or via space to the receiving device 18 side.

In this way, the power supply voltage is increased when starting up the fluorescent lamps and electric motors of the load-side electrical equipment 20 to ensure smooth startup, and power is supplied when operating equipment that is sensitive to low voltages and is connected in parallel to the fluorescent lamps and electric motors. It is possible to increase the voltage to improve operation, or to increase the power supply voltage to ensure reliable operation when operating equipment is sensitive to low voltages.

Additionally, when the heater load is operating, due to the nature of the thyristor, the power supply voltage increases in the current synchronous type, and the power supply voltage decreases in the voltage synchronous type, but in this case, the power supply voltage must be lowered or increased to keep the output voltage constant. This allows the control level of dimming, rotation control, power saving, etc. by the power controller to be kept constant.

Furthermore, if the fluorescent lamp of the load-side electric device 20 causes a flicker phenomenon due to low voltage, this may be detected as a time when the power supply voltage needs to be increased.If the electric device enters an overload operation state due to low voltage. The same is true.

Embodiment Next, a preferred embodiment of the present invention will be described with reference to FIG.

FIG. 2 shows a system in which the load side is a vending machine 2B, and the power supply voltage E is lowered by an external power controller main body 28 to supply power and save power.

First, the vending machine 2B is equipped with a plurality of loads that commonly receive power via a cable 30, and these loads include a fluorescent lamp 32 of a glow set and a motor (M conductive motor) that drives a compressor 34 for a refrigerator. )36. These are a product supply mechanism (coin knock) 38 that includes a small motor, and a microcomputer system 40 that controls the entire system.

The fluorescent lamp 32 is operated by a timer operated relay switch 4.
2. The motor 3B is operated by a relay switch 44. The product supply mechanism 38 is a relay switch 4 operated under the control of a microcomputer system 40.
6.

The microcomputer system 40 is equipped with a money recognition machine 48, and when money is inserted, it determines the amount, and closes the relay switch 46 to supply the product selected with the product selection switch (not shown) to the outside. After the supply, change is provided and the relay switch 46 is opened.

For the fluorescent lamp 32, motor 36, and product supply mechanism 38.

The automatic vending machine 1126 has a device 5 for detecting when the power supply voltage needs to be increased.
0 is attached. This detection device 50 includes a fluorescent lamp start-up detection base 52, a motor start-up occurrence detector 54, and a product and supply mechanism start-up occurrence detector 5B.

In this embodiment, each detection @52, 54.58 is composed of a switch that opens the contact for a short time in conjunction with the closing operation of the relay switch 42, 44.46, as shown in FIG. .58 is connected to a voltage increase command transmitting device 58. When either of the detectors 52, 54, 58 detects the occurrence of activation, the voltage increase command transmitting device 5
8 immediately generates a pulse voltage and superimposes it on the cable 30.

Specifically, for example, as shown in FIG.
A coil 84 and a relay switch 8B are connected in series between the power supply lines 80 and 82, and the detectors 52, 54 and 513 are installed in series between the control side of the relay switch 66 and the power supply.

If any of the contacts of the detectors 52, 54, 58 are closed, the relay coil 68 is energized to close the relay contact 70 and the coil 84 is energized.

Here, the relay switch 42, 44.48 of the fluorescent lamp 32, the motor 3B, or the product supply mechanism 38 closes to start the activation, and one of the corresponding detectors 52, 54.58 closes the contact point for a short time. When the relay contact 70 opens and detects the occurrence of activation, a large reverse induced electromotive force is instantaneously generated and is superimposed and transmitted as a pulse voltage on the voltage line. As a result, the pulse voltage is transmitted to the power controller main body 28 via the cable 30 as a voltage increase command. Even if the cable 30 becomes long, it is possible to reliably transmit the signal without providing a special signal transmission path.

In addition, in the automatic edition sales 112B, the relay switch 44
is linked to a thermostat (not shown) that operates by detecting the product temperature, and when the product temperature exceeds a predetermined value, the relay switch 44 closes at the same time as the thermostat closes, and conversely, when the product temperature falls below a predetermined value. When the thermostat opens, the relay switch 44 also opens at the same time.

The induction motor 36 has a constant rotation characteristic with little change in rotation speed even if the applied voltage changes, and the compressor 34
has a constant load torque characteristic in which the load torque is almost constant even when the rotational speed changes. Normally, for example, the 100V induction motor 36 for driving the compressor 34 has an applied voltage of about 85V.
Normal operation is possible even at an operating point of ~80V,
Even if the applied voltage increases, there is little change in the rotational speed and the cooling capacity hardly changes.Therefore, power can be saved by the voltage drop from toov.

However, the starting torque of the induction motor 36 is small, and on the contrary, the starting load torque of the compressor 34, such as a reciprocating type, is large. Therefore, when the relay switch 44 closes to start the motor, the applied voltage to the induction motor 411138 is 85V. Then, the effective power becomes insufficient and a rotation lock phenomenon occurs due to the imbalance between rotational torque and load torque.
It may not start smoothly or may be difficult to start.

The relay switch 42 is linked to a timer (not shown), and for example, from 5 o'clock in the evening when it is dark outside to 7 o'clock in the morning.
It is now closed until midnight, and is now open from 7 a.m. to 5 p.m.

The fluorescent light 32 is used to illuminate the product sample to make it easier for the user to see the product, and if the applied voltage is set to 85V with phase control compared to a 100V lamp, a large power saving rate of about 50% can be obtained.

However, as in the case of the induction electric motor 113B, if the voltage applied to the fluorescent lamp 32 is low at the time of initial lighting when the relay switch 42 is closed, the filament will not be heated sufficiently and the skid voltage will be insufficient, making lighting difficult.

In normal cases, the product supply mechanism 38 can drop the product into the outlet if the applied voltage is maintained at 85V or higher. However, if the installation environment of the machine is poor and it is not maintained, dirt and dust may accumulate inside the supply mechanism 3.
In particular, in the case of heavy products such as one-pronged cans and one-packs, if the applied voltage is low, the driving force may be insufficient and the product may get stuck.

The vending machine 26 has a vending machine side cable 30. plug 72,
It is connected to the power controller main body 2 via the socket 74 and the power controller side cable 7G. This power controller main body 28 has a phase control by a thyristor 78, for example, AC10.
Normally, the 0V power supply voltage is lowered to 85V and output, and when a command to increase the power supply voltage is received from the load side, the 1 phase angle is minimized, the conduction angle is approximately toot, and the output voltage is 100V for a predetermined time.
It has the function of

This power controller main body 28 includes a power supply voltage increase command receiving device M80 that detects the instantaneous pulse voltage superimposed on the power supply voltage of the cable 30.76 and sent from the vending machine 2B and receives a power supply voltage increase command, and A predetermined time predetermined by the timer 82 based on the command (for example, the time required to start the fluorescent lamp 32, that is, complete the initial lighting, the time required to complete the start of the motor 36, and the operating time of the product supply mechanism 38, 7S) as the time to sufficiently cover the longest one),
Thyristor 7 with the minimum phase control angle of trigger circuit 84
8 from the normal phase control angle of 85V to 100V, and after time-up, the trigger circuit 84 is returned to the normal phase control angle to reduce the output from 100V to 85V again.

The power controller main body 28 is specifically constructed as shown in FIG.

That is, in the figure, for example, a main power switch 80 and a fuse 92 are connected to a plug 88 that receives a commercial type [AGlooV supply].
Triacs 78 are connected in series through the TRIACs 78 to form a main circuit.

The trigger circuit 84 has a function of switching the phase angle into two stages: a substantially minimum value (the conduction angle is approximately the maximum value of 180) and a normal phase angle (the conduction angle is a value smaller than 180).

The trigger circuit may be a power supply voltage synchronized type, but in the wooden embodiment, a current synchronized type is used.

Trigger circuit 844 includes a capacitor AT whose one terminal is connected to the Tl side of the triac 78, and four diodes D1 bridge-connected in a predetermined direction to both ends of this C1.
~D4, Dl and 02. D2 and 03. Resistors R1 to R5 are connected between each connection point of D3 and D4 and the T2 side of the triac 78, and the other terminal of Ct, that is, D2 and D3.
The phase angle variable circuit 94 is connected to both ends of the resistors R2 and R3.

In this trigger circuit 84, a current flows from C1 to R2, R3, and R4 during a period when the Tl side of the triac 78 is positive and the T2 side is negative, and conversely, a current flows through R during a period when the Tl side is negative and the T2 side is positive.
4゜Current flows from R2 and R3 to C1, and in either case, after the polarity changes, switch the SBS after a predetermined charging time determined by C1 and R2-R4, and try 7-
7. Apply a negative or positive trigger pulse to the G terminal of 78.

When a trigger pulse is input from the trigger circuit 84, the triac 78 becomes conductive and remains conductive until the voltage between the primary, TI and 72 becomes zero, and from the moment the power supply voltage becomes zero until it receives the trigger pulse and becomes conductive. This phase angle can be varied by adjusting the variable resistor R3, and in this embodiment, for example, the AClo
It is set to a value that reduces the oV voltage (line voltage) to 85V and supplies it to the load. The phase angle at this time is hereinafter referred to as the normal phase angle.On the other hand, R4 is much smaller than R2 and R3, and when both ends of resistors R2 and R3 are short-circuited, the non-conduction angle is the minimum phase near zero. At this time, the input voltage AC 100V is applied almost as is to the load.

In addition, by appropriately changing the value of R4, instead of the minimum phase angle, it is also possible to set the phase angle such that the voltage applied to the load when both ends of R2 and R3 are short-circuited is, for example, 90V.

D1 to D4 in the trigger circuit 84. R1 and R5 are for reducing hysteresis.

The phase angle variable circuit 34 includes diodes 010 to 013 bridge-connected to both ends of R2 and R3, and an SC inserted between the connection points of DIG and Dll and the connection point of [113 and 012.
It consists of R.

When a gate signal is applied to this SCR and it becomes conductive, the resistance R2,
R3 is shorted. Conversely, when the SCR is non-conductive, the variable phase angle circuit 94 is disconnected from R2 and R3 and becomes irrelevant.

A choke coil Ll is connected in series in the main circuit on the Tl terminal side of the triac 78, and the choke coil Ll
, A capacitor C2 is connected in parallel with the triac 78. These Ll and C2 form a low-pass LC filter, and together with the choke coil L2 connected in series in the main circuit on the T2 terminal side of the triac 78, they are used to suppress high frequency noise that occurs when the triac 78 turns off and turns on. belongs to. C3. inserted in parallel to C2. R13 is for noise suppression and adjustment to improve turn-off and turn-on of the triac 78.

On the other hand, there is a C between the tl and T2 terminals of the triac 78.
4, R7 and C5, R8 are connected in parallel. These C4, R7, 05, and R8 are intended to prevent flickering, which tends to occur when the fluorescent lamp 32 of the load receives a phase-controlled low voltage.

To explain in more detail, generally speaking, when a phase-controlled voltage is applied to a fluorescent light load, there is almost no problem if the phase angle is small and the power saving rate is 20% or less, but if the power saving rate is 30%.
When the phase angle exceeds 90', a flickering phenomenon (including flickering at every cycle to flashing at intervals of several seconds) will occur, and when the phase angle exceeds 90', the light will no longer turn on. For this reason, conventionally it is 20% to 3
It was difficult or impossible to save power by more than 0%.

However, if a small current is applied to the fluorescent light even when the triac is not conducting (of course at a level that does not significantly impair the power saving effect), the phase angle can be increased to 8 without causing the flicker phenomenon.
The inventor has discovered that phase control of 0° or more is possible.

A method of passing a small current through the fluorescent light when the torch is not conducting is to install a bypass circuit in parallel to the triac in the main circuit, and turn on the bypass circuit to allow current to flow only when the torch is not conducting. The bypass circuit is always on so that current flows through the bypass circuit both when the triac is not conducting and when it is conducting (however, when the triac is conducting, the voltage across both ends is almost zero).

The former can be composed of, for example, thyristor elements, R, C, L, etc., which are controlled in a phase opposite to that of the trigger. The latter can be composed of R, C, L, etc.

Additionally, a pulse generator or the like may be connected to both ends of the fluorescent light to cause a small current to flow through the fluorescent light when the triac is non-conducting. Any small current supply circuit that can flow current may be used.

Specifically, a small current flowing in a bypass circuit with only a resistor is fine, but it has the disadvantage of causing heat loss in the resistor, so C
Mainly, and set constants appropriately in combination with R.

In this way, it is possible to save power by more than 80%.

In this embodiment, for example, when using five 100V 30V fluorescent lights, for example, C4=0.1 +"+R
7=100Ω, cs=a, t #LF, R8=
The resistance should be approximately 50Ω. C4, R7, C:5. R8 as a whole also has Ja fE as a snubber circuit.

Furthermore, even if a disconnection accident occurs on the C5 and R8 sides, since C4 and R7 are set to the same constants as the conventional snubber circuit, the turn-off and turn-on operations of the triac 78 can be maintained in good condition.

A transformer 96 is connected to the load side of the fuse 92 in parallel with the main circuit. This transformer 96 has a primary input A
C: A bridge circuit 98 that converts 100V to a secondary output AC 12V and consists of four diodes D5 to D8 connected to the secondary side, a resistor R9, a large capacitor C6,
Together with the bleeder resistor RIO, the light emitting diode D8 for power ON indication, the resistor R11, and the Zener diode ZD, a stable DC voltage E of 9V (Zener voltage of 20) is obtained from AClooV.

The transformer 36 and the bridge circuit 98 are transistors Tr.
At the same time, the power supply voltage increase receiving device 80 is operated.

The transistor Tr has a collector connected to a DC voltage E via resistors R12 and R13, and an emitter connected to ground via a resistor R14. The output terminal voltage BE of the bridge circuit 98 is applied to the base of T'' via a resistor R15.

The emitter output E0 of T during normal operation changes in proportion to BH. The magnitude of this output voltage E0 can be adjusted to an appropriate value by changing the variable resistor R13.

Then, when a pulse voltage is superimposed on the cable 30.78, this pulse voltage enters the Tr from the transformer 96 or the bridge circuit 98 through the base circuit of the Tr, and is amplified to produce an output voltage E. It will be superimposed on

Tr emitter output E. is applied to the trigger terminal TR of the timer circuit 100. In the timer circuit 100, a power terminal V is connected to a DC voltage E, and a terminal V- is connected to ground. Reset terminal R is connected to terminal G. A "low" level reset signal is input to this terminal G. Further, the threshold terminal TH is connected to the ground via the capacitor C7, and the resistors R1, 8 are connected to the spring 1. teE)-
The cultivated dif-TH is also connected to the discharge terminal DC.

R18 and C7 are for setting one hour of the timer circuit 100, and are set to approximately 7S.

The control voltage terminal Cv of the timer circuit 100 is connected to ground via a capacitor C8 to prevent malfunction.

The timer circuit 100 configured in this manner operates as follows. That is, assuming that the DC terminal and the output terminal OUT are at a "low" level in advance, and that C7 is in a fully discharged state, the input level of the Tr terminal is 1/3 or less of the applied voltage between V+ and ■- ( When the voltage falls below the trigger threshold (VTR), a timer start operation is performed to open the DC terminal and simultaneously set the output terminal OUT to a "high" level.

Then, as time passes, charging of C7 progresses via RlB, and when the + side voltage of C7 reaches 2/3 or more of the applied voltage between V+ and V-, a time-up occurs and the DC terminal is set to the "low" level. At the same time, set the output terminal OUT to "low"
level.

However, before time-up, a "low" signal is applied to the R terminal via the G terminal.
When a level reset signal is input, the timer circuit 100
performs a reset operation and sets the output terminal OUT to a "low" level.

The level of the emitter output E0 is set to be higher than the trigger threshold VTR by a predetermined amount under normal operating conditions.

The OUT terminal of the timer circuit 10G is connected to the gate circuit 1G2.

The gate circuit 102 includes a resistor R19 connected in series between E and ground, and a light emitting diode D14 for indicating when the adjustment circuit is operating. It consists of resistors R2G and R21.

The OUT terminal of the timer circuit 100 is connected between R113 and 014. Further, both ends of R21 are connected to the gate terminal and cathode terminal of SCH.

When the OUT terminal of the timer circuit 100 is at the [low] level,! ] 14 is not lit, and the voltage across R21 is almost zero, so the SCR becomes non-conductive, and the variable phase angle circuit 94 is separated from R2 and R3 and has no influence.

At this time, the triac is usually controlled by phase angle.

Conversely, when the OUT terminal of the timer circuit 100 is at a "high" level, 014 lights up and a voltage is generated across R21, making the SCR non-conductive. At this time, R2 and R3 of the trigger circuit 84 are short-circuited through DIG~013, and the triac 78 is controlled at the minimum phase angle.

"Operation" Next, the operation of this embodiment configured as described above will be explained. It is assumed that the plug 88 is connected to a commercial power source and the main power switch 80 is turned on in advance. Furthermore, since current flows through the microcomputer system 40 in the vending machine 2B when the power is turned on, it is assumed that the triac 78 normally controls the phase of the voltage using the phase angle. Therefore, the power supply voltage to the load side is 85V.

Initially, when the product temperature rises and the thermostat is activated, relay switch 44 closes, detector 54 opens briefly and a pulsed voltage is superimposed on cable 30. This pulse voltage is passed through the cable 30.78 to the power controller body 28.
is detected by the transformer 9G or the bridge 1 circuit 88, goes around to the base circuit of the Tr, and outputs the emitter output E.
. causes fluctuations in

The emitter output Eo of this Tr is T of the timer circuit 100.
It is input to the R terminal.

Since the decrease in Eo is large, it falls below the trigger threshold VTR of the timer circuit 100, and the timer starts. At the same time as the timer starts, R2 in the trigger circuit 84,
R3 is shorted. Therefore, triac 40 provides phase control with a minimum phase angle and a total voltage of approximately 100 volts is applied to load 38.

Therefore, when the induction motor 48 is started, a voltage sufficient for smooth starting operation of TOOV is applied, and the induction motor 48 is started smoothly. Then, when a preset time of, for example, 79 (the induction motor 3B reaches normal rotation in 2.3 seconds) in the timer circuit 100 has elapsed, the time is up and the triac 7
8 reliably returns to the normal phase angle control state for power saving. After that, the induction motor 38 is operated at 85V to save power. The induction motor 3B is operated until the product reaches a predetermined temperature and the thermostat opens.

Next, when the product selection switch is pressed by the user, the relay switch 4B is closed and the product supply mechanism 38 is about to operate.

When the relay switch 4B closes, the detector 5B opens for a short time, so that a pulse voltage is generated as a voltage increase command in the same manner as described above. Therefore, this pulse voltage enters the base circuit via the main circuit, transformer 8B, bridge circuit 98, etc., and appears at the emitter output E of the Tr. Because E falls below the instantaneous trigger threshold VTR due to the fluctuation component on E, the timer starts, and in the same manner as described above, the voltage applied to the product supply mechanism 38 becomes the full voltage of 100V, ensuring that the product does not get caught. It is possible to carry out product supply operations.

Then, when the operation of the product supply mechanism 38 is completed, a time-up occurs and the output of the timer circuit 100 changes to "low", thereby ensuring power saving for other devices.

Further, when the time reaches 5 pm and the timer is activated and the relay switch 42 is closed, a voltage of 85V is applied to the fluorescent light 32. The fluorescent lamp 32 is energized by the voltage application, starts discharging, and attempts to initially light up. This relay switch 42
When closed, the detector 56 opens briefly and a pulsed voltage is superimposed on 30. Therefore, in the same way as described above, the pulse voltage enters the base circuit of T' by looping from the ground in the power controller main body 28, and E is the fluctuation component superimposed on this E which appears at the emitter output E. Since the instantaneous trigger threshold value VTR is lowered, the timer starts, and in the same manner as described above, the voltage applied to the fluorescent lamp 32 becomes the full voltage of 100V, and the filament is sufficiently heated and the kick voltage is also at a sufficient value, so the initial lighting failure is detected. After the initial lighting operation is completed, the triac 78 turns on after 7 seconds (sufficient time for the fluorescent lamp 32 to complete lighting) set in advance by the timer circuit 100 has elapsed. The control state returns to the normal phase angle. Therefore, after 5 hours, the fluorescent light 32 continues to be lit at 85V, resulting in significant power savings. At 7 o'clock, the verse limit timer operates and continues until the relay switch 42 is opened.

According to the above embodiment, when an optional power saving device is connected to the outside of the vending machine, the vending machine side detects the start-up or operation of electrical equipment, superimposes a voltage increase command on the cable, and sends it to the power controller main body. This makes it possible to reliably apply the full voltage that lasts for a predetermined period of time when starting up the equipment, ensuring smooth and reliable startup and operation, and even when the power cable becomes long. Since there is no need for a special signal transmission path for the ascending command, it can be freely arranged, and the cost of the entire cable is reduced.

In addition to the above embodiments, the load side detects the start-up operation period, the operation period, etc., and continuously sends the voltage variable command during this period, eliminating the need for a timer on the power controller main body side. The voltage may be changed while receiving the voltage change command. In this case, command signals of different fixed frequencies may be used for ascending and descending, and the receiving side may separate and detect the waves through a filter to obtain an ascending command or a descending command.

If there is a resistive load such as a heater on the load side, if the thyristor is a current-synchronized type, the phase angle becomes small while power is being applied to the heater, and the supply voltage increases. In addition,
If the fluorescent lamp or electric motor is off and the reheater is on, the thyristor will generate large noise, which could cause the microcomputer to malfunction. When a weak operation is being performed, a device to detect this can be installed to issue a voltage increase command to make the conduction angle of the thyristor 10 oz.In order to increase the supply voltage, short-circuit both ends of the thyristor with an AC relay. Alternatively, the power supply voltage may be lowered by making the OR time constant that determines the trigger timing of the trigger circuit variable in advance and reducing C or R.

Furthermore, during low voltage operation, a device may be provided to detect fluorescent lamp flicker or motor overload, and when these are detected, the power supply voltage may be increased to eliminate malfunctions.

Further, commands may be transmitted and received using radio waves, optical 1Mi sound waves, or the like.

"Effects of the Invention" As described above, according to the present invention, with an extremely simple configuration,
It is possible to apply a large voltage when starting up or operating load-side electrical equipment to ensure smooth startup and smooth operation, and to ensure power savings after startup or operation. .

Further, when there is a risk that the load-side electrical equipment may malfunction, a large voltage is applied to suppress the occurrence of malfunction, and it is possible to reliably save power while the malfunction does not occur.

Furthermore, even if the power controller main body and the load-side electrical equipment are separated, there is no need for a special signal transmission path, allowing for free arrangement and reducing cable costs.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the basic configuration of the present invention, Figure 2 is a block diagram showing the basic configuration of the present invention.
The figure is a schematic block diagram showing one embodiment of the present invention, FIG. 3 is a detailed block diagram showing a part of the vending machine shown in FIG. 2, and FIG. 4 is a detailed block diagram showing the power controller main body side of FIG. 2. It is a diagram. 10... Power controller main body. 12... Thyristor. 14... Voltage lifting device. 18... Power supply voltage variable command receiving device, 18... Power cable, 20... Load-side electric equipment, 22... Power supply voltage variable necessity timing detection device. 24...Variable power supply voltage command transmitter, patent applicant
Sp Planning Co., Ltd. Patent Attorney Ina
Hitoshi Kaki Righteous Procedures (Method) July 1985 Date Offset

Claims (1)

[Claims] (1) A means for detecting when it is necessary to change the receiving voltage, which is provided in the load-side electrical equipment, to detect when the receiving voltage should be increased or decreased, and increasing the power supply voltage based on a detection signal from the means for detecting when it is necessary to change the receiving voltage. a power supply voltage variable command transmitting means for generating and transmitting a command to the power supply side to increase or decrease the power supply voltage; A power controller comprising: power supply voltage variable command receiving means provided on the voltage raising/lowering means side to receive a power supply voltage variable command and outputting it to the voltage raising/lowering means to raise/lower the voltage.