JP2002330588A - Converter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make cost reduction by vastly reducing costs, such as material costs, development costs, inventory control and the like for the whole device, by using parts of the same specification, whether the capacity is a large one, or it is a small one, in a capacitor-input type rectifier circuit, for which power factor improvement and high-frequency suppression are required. SOLUTION: Power factor improvement, high-frequency suppression and generation of specified DC voltage are made, by using a converter module of the same specification, which has a small capacity while large in production amount, by combining one or more of the converter modules, regardless of whether it is a single-phase converter or a three-phase one, and whether the input capacity is a large one or a small one.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a converter device for improving a power factor of an air conditioner, suppressing power supply harmonics, adjusting a DC output voltage, and the like. The present invention relates to a converter device that secures electric power.

[0002]

2. Description of the Related Art A single-phase or three-phase AC voltage or a three-phase AC voltage supplied from a three-phase commercial power supply is rectified and smoothed, converted to a DC voltage, and then supplied to an inverter device. Conventionally, as a converter device for driving a compressor of an air conditioner, improving a power factor of an air conditioner, suppressing power supply harmonics, adjusting a DC output voltage, etc., a single-phase converter device shown in FIG. A three-phase converter device shown in FIG. 17 is known.

A converter device 101 shown in FIG. 16 performs full-wave rectification of a single-phase AC voltage supplied from a single-phase commercial power supply 102, and switches this full-wave rectified voltage to a specified voltage. The converter circuit 10 generates a DC voltage having a value, supplies the DC voltage to the inverter device 105, and drives the compressor 106 and the like of the air conditioner.
3 is compared with a voltage value and an input current value of a DC voltage output from the converter circuit 103 and a preset set voltage value and a set current value, and the switching of the converter circuit 103 is performed based on these comparison results. And a control circuit 104 for controlling the operation.
The converter circuit 103 is controlled based on the result of monitoring while monitoring the voltage value and the input current value of the DC voltage supplied to the converter 103.

The converter circuit 103 includes a diode bridge 108 composed of four rectifying diodes 107 connected in a bridge, a current value detecting resistor (shunt resistor) 109 for detecting an input current value, and a control circuit 1.
04, a semiconductor switching element 110, a reactor 111, a fast recovery diode 112,
And a smoothing capacitor 113.

The single-phase AC voltage supplied from the commercial power supply 102 is full-wave rectified by the diode bridge 108, and when the control circuit 104 outputs an ON signal, the semiconductor switching element 110 is turned ON. Then, the electromagnetic energy is stored in the reactor 111, and when the ON signal is no longer output from the control circuit 104, a back electromotive voltage corresponding to the electromagnetic energy stored in the reactor 111 is generated, and the reactor 111 →
A counter electromotive voltage (DC voltage) is supplied to the smoothing capacitor 113 through a path from the first recovery diode 112 to the smoothing capacitor 113 to boost the DC voltage to a set DC voltage, smooth the same, and then supply it to the inverter device 105.

The control circuit 104 uses a voltage detection point 114 provided on the cathode side of the first recovery diode 112 to detect the voltage value of the DC voltage supplied from the converter circuit 103 to the inverter device 105 (voltage value detection). Signal) and an input for receiving a current value detection signal output from the current value detection resistor 109, and a voltage value and a current value detection signal indicated by the voltage value detection signal captured by the input unit. The set current value is compared with the set voltage value and the set current value set by the setting means, and the set voltage value set by the setting means is matched with the voltage value indicated by the voltage value detection signal. A calculation unit that determines the switching cycle and pulse width necessary for the operation, and a switching cycle that corresponds to the calculation result of this calculation unit. Generates an on signal of the scan width, and an output unit that turns on / off the semiconductor switching element 110.

Further, a converter device 121 shown in FIG.
Switches the three-phase AC voltage supplied from the three-phase commercial power supply 122 for each phase to generate a specified DC voltage value and an input current value, and supplies these to the inverter device 125. , Air conditioner compressor 12
6 is compared with a DC voltage value and an input current value output from the converter circuit 123 and a preset set voltage value and a preset current value. Control circuit 124 that controls the switching operation of converter circuit 123 based on
The control circuit 124 monitors the voltage value and the input current value of the DC voltage supplied from the converter circuit 123 to the inverter device 125, and controls the converter circuit 123 based on the monitoring result. 3
The three-phase AC voltage supplied from the three-phase commercial power supply 122 is switched for each phase to generate a DC voltage having a specified DC voltage value and an input current value, and the DC voltage is supplied to the inverter device 125.

The converter circuit 123 detects three reactors 127 that generate a back electromotive voltage using three-phase AC voltages supplied from the three-phase commercial power supply 122, and detects the current of each phase, and controls this. The two current transformers 128 to be supplied to the circuit 124, the diode bridge 130 formed by the six rectifying diodes 129, and the rectifying diodes 129 included in the diode bridge 130 are connected in parallel to each other. When the on signal is output from the
Six semiconductor switching elements 131 for accumulating current energy in each reactor 127 and generating a back electromotive voltage in each reactor 127 when an ON signal is not output from control circuit 124, and a DC voltage output from diode bridge 130 And a smoothing capacitor 132 that supplies the smoothing capacitor 132 to the inverter device 125.

Each time the control circuit 124 outputs an ON signal of each phase, the semiconductor switching element 1 of each phase
31 is turned on, the electromagnetic energy is accumulated in the reactor 127 of each phase, and each time the ON signal of each phase is no longer output from the control circuit 124, the reactor 12 of each phase is turned off.
7, while generating a back electromotive voltage, the diode bridge 1
By 30, the back electromotive force is full-wave rectified, and the resulting DC voltage is supplied to the smoothing capacitor 132, smoothed, and then supplied to the inverter device 125.

The control circuit 124 uses the voltage detection point 133 provided on the output terminal side of the diode bridge 130 to capture the voltage value (voltage value detection signal) of the DC voltage supplied to the inverter device 125. An input unit for receiving each current value detection signal output from each current transformer 128, a voltage value indicated by the voltage value detection signal captured by the input unit, a current value indicated by the current value detection signal, The switching required to compare the set voltage value and the set current value set by the setting means and match the set voltage value set by the setting switch with the voltage value indicated by the voltage value detection signal. Generates an ON signal with a specified pulse width with a calculation unit that calculates the period, pulse width, etc., and a switching period that corresponds to the calculation result of this calculation unit , And an output unit that turns on / off phases of the semiconductor switching element 131.

[0011]

By the way, in the single-phase converter device 101 shown in FIG. 16, the semiconductor switching element 110 and the first recovery diode 112 are used.
When a semiconductor switching element or a diode element having a large capacity is used, the entire apparatus becomes expensive. Therefore, according to the compressor capacity of the air conditioner to be driven, the rating and usage of each semiconductor switching element 110 are determined. Number, diode for fast recovery 112
After determining the rating, the number of devices to be used, and the like, the device is selected based on the determination result, and the wiring pattern of the printed wiring board is determined.

For this reason, in home electric appliances having many specifications such as an air conditioner, an AC voltage supplied from the commercial power supply 102 is switched to generate a specified DC voltage.
For a converter device that performs at least one of power factor improvement and harmonic suppression, a converter device 101 having a different current capacity must be prepared for each home appliance specification.

As a result, the converter device 101 is difficult to manage, and when manufacturing a small number of home electric appliances such as a model having a large capacity, material costs and the like are reduced.
There has been a problem that it is difficult to collect mold costs and the like, which increases costs. Also, the three-phase converter device 121 shown in FIG. 17 is a large-sized air conditioner, industrial equipment, and the like.
21 had to be developed, and there was a problem that the cost was high.

The present invention has been made in view of the above, and is an apparatus to be driven by combining one or more single-phase converter modules of a single specification constituted by a semiconductor switching element having a small capacity or the like. Even when the capacity of the power supply is small or large, the power factor of single-phase power supply equipment can be improved and harmonics can be suppressed, thereby greatly reducing the material costs, development costs, and inventory management of the entire equipment. It is an object of the present invention to obtain a converter device that can reduce costs and reduce costs.

Further, a single-phase converter module of a single specification constituted by a semiconductor switching element having a small capacity is connected in a delta connection so that the device to be driven has a three-phase structure whether the capacity is small or large. It can improve the power factor of power supply voltage equipment and suppress harmonics.This greatly reduces the cost of materials, development, inventory control, etc. of the entire equipment, and reduces the cost of converter equipment. The purpose is to get.

Further, a plurality of converter modules, each of which is composed of one or more single-phase converter modules of a single specification composed of small-capacity semiconductor switching elements or the like, are connected in a delta connection, so that a device to be driven can be large. Even for equipment, the power factor of three-phase power supply equipment can be improved and harmonics can be suppressed, thereby greatly reducing the material costs, development costs, inventory management, etc. of the entire equipment, and reducing costs. The purpose is to obtain a converter device that can be downed.

Further, each single-phase converter module of a single specification constituted by a semiconductor switching element having a small capacity is selectively operated, and the converter module which becomes unstable at a light load is replaced by By reducing the power consumption and increasing the load under heavy load, it is possible to generate a DC voltage with an optimal current value corresponding to the power consumption of the device to be driven, which fluctuates the power consumption of the device to be driven Even so, an object of the present invention is to obtain a converter device capable of performing a stable switching operation.

Further, even if the characteristics of each component constituting the single-phase converter module vary, the current input to each single-phase converter module can be adjusted without an additional circuit so that the material cost, development cost, It is an object of the present invention to obtain a converter device that can reduce costs such as inventory management and the like by drastically reducing labor.

Further, it is possible to easily arrange the components in parallel, and to dramatically improve the durability against external environmental changes, thereby stabilizing the conversion operation, thereby maintaining the entire device and maintaining it. It is an object of the present invention to obtain a converter device that can significantly reduce the time and labor for inventory management and the like and reduce costs.

Further, the device to be driven can be driven. Even if the device to be driven is a small-sized air conditioner or a large-sized air conditioner, a small-capacity rectifying diode is provided. , Combining one or more single-phase converter modules with a single specification composed of small-capacity semiconductor switching elements, etc.
The DC voltage of the optimal voltage value can be supplied to the compressor of the air conditioner and driven, thereby greatly reducing the material costs, development costs, inventory management, etc. of the entire air conditioner. Therefore, it is an object of the present invention to obtain a converter device capable of reducing costs.

[0021]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a single-phase converter device that switches an input power supply voltage to generate a DC voltage having a specified voltage value. Combining multiple single-phase converter modules manufactured with the same capacity and the same specifications to perform at least one of power factor improvement or harmonic suppression to generate a DC voltage with a specified voltage value, power factor improvement or harmonic suppression Characterized by performing at least one of the following.

According to the present invention, in a single-phase converter, at least one of generation of a DC voltage having a specified voltage value, power factor improvement or harmonic suppression is performed by switching an input power supply voltage. Combining multiple single-phase converter modules manufactured with the same capacity and the same specification to generate a DC voltage with the specified voltage value, a single-specification single-phase consisting of small-capacity semiconductor switching elements Combine one or more converter modules to generate a DC voltage of the specified voltage value, improve the power factor, or adjust the harmonics from a single-phase power supply voltage even when the capacity of the device to be driven is small or large. By performing at least one of wave suppression, the cost of material, development, and inventory management of the entire system can be significantly reduced, Measure down.

According to the next invention, in a three-phase converter device, at least one of generation of a DC voltage having a specified voltage value, power factor improvement or harmonic suppression by switching an input power supply voltage. A plurality of single-phase converter modules manufactured with the same capacity and the same specification are connected in a delta type, and the input three-phase AC voltage is switched for each phase, and a DC voltage of a specified voltage value is switched. It is characterized in that at least one of generation, power factor improvement or harmonic suppression is performed.

According to the present invention, in the three-phase converter device, the input power supply voltage is switched to perform at least one of generation of a DC voltage having a specified voltage value, power factor improvement or harmonic suppression. A plurality of single-phase converter modules manufactured with the same capacity and the same specifications are connected in a delta type, and the input three-phase AC voltage is switched for each phase to generate a DC voltage having a specified voltage value. By connecting the single-phase converter module of a single specification composed of small-capacity semiconductor switching elements and the like in a delta connection, even when the capacity of the device to be driven is small or large, a three-phase power supply is provided. By generating at least one of the DC voltage of the specified voltage value, power factor improvement or harmonic suppression from the voltage, the material of the entire device is , Development costs, and greatly reduce the time and effort such as inventory management, reduce the cost down.

According to the next invention, in a three-phase converter device, at least one of generation of a DC voltage having a specified voltage value, power factor improvement or harmonic suppression by switching an input power supply voltage. The same capacity, a plurality of single-phase converter modules manufactured with the same specifications are connected in parallel, three converter module groups are manufactured, and each converter module group is delta-connected to an input line, and input is performed. The three-phase AC voltage is switched for each phase, and at least one of generation of a DC voltage having a specified voltage value, power factor improvement, and harmonic suppression is performed.

According to the present invention, in the three-phase converter device, the input power supply voltage is switched to perform at least one of generation of a DC voltage having a specified voltage value, power factor improvement or harmonic suppression. A plurality of single-phase converter modules manufactured with the same capacity and the same specifications were connected in parallel to produce three converter module groups, and the respective converter module groups were delta-connected to an input line and input. By switching a three-phase DC voltage or a three-phase AC voltage for each phase and performing at least one of the generation of a DC voltage having a specified voltage value, power factor improvement, and harmonic suppression, a small capacity is achieved. Multiple converter modules combining one or more single-phase converter modules with a single specification composed of semiconductor switching elements, etc. Even if the device to be driven is a large device by connecting the groups in delta, at least one of generation of a DC voltage of a specified voltage value, power factor improvement or harmonic suppression from a three-phase power supply voltage By doing so, labor such as material costs, development costs, and inventory management of the entire apparatus can be significantly reduced, and costs can be reduced.

The next invention is characterized in that a converter on / off circuit for selectively operating each single-phase converter module according to a current value input from each single-phase converter module is provided. .

According to the present invention, each single-phase converter module is selectively operated in accordance with the current value input from each single-phase converter module, and the converter module which becomes unstable at a light load is lightened. By reducing the number of combinations at the time of load and increasing the number of combinations at the time of heavy load, it is possible to generate a DC voltage having an optimal current value according to the power consumption of the device to be driven, thereby reducing the consumption of the device to be driven. Even if the amount of power fluctuates, a stable switching operation is performed to output a DC voltage.

In the next invention, each of the single-phase converter modules has an IGTB as a switching element.
It is characterized by using.

According to the present invention, each of the single-phase converter modules uses an IGTB as a switching element, so that the characteristics of the components constituting the single-phase converter module vary, and the input to each single-phase converter module is performed. The IGBT is not
By adjusting the input current value without an additional circuit by the self-current-reducing action of the above, the time and labor such as material cost, development cost and inventory management of the entire apparatus can be greatly reduced, and the cost can be reduced.

In the following invention, each of the single-phase converter modules is characterized in that main components are modularized and used as one component.

According to the present invention, each of the single-phase converter modules has its main components modularized and used as one component, thereby facilitating parallel connection as a component and endurance against external environmental changes. This greatly improves the performance and stabilizes the conversion operation, thereby greatly reducing the maintenance costs, development costs, inventory management, and the like of the entire device, thereby reducing costs.

The next invention is characterized in that each of the converter devices is used in a compressor drive circuit of an air conditioner.

According to the present invention, each of the single-phase converter modules can drive a device to be driven by supplying a DC voltage to the compressor of the air conditioner, and the device to be driven can be reduced in size. Or large air conditioners, one or more single-phase converter modules with a single specification composed of small-capacity rectifying diodes, small-capacity semiconductor switching elements, etc. In combination, the DC voltage of the optimal current value and the optimal voltage value is supplied to the compressor of the air conditioner and driven, thereby driving the material cost, development cost, inventory management, etc. of the entire air conditioner. We will greatly reduce labor and reduce costs.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a converter device according to the present invention will be described in detail with reference to the drawings.

Embodiment 1 FIG. 1 is a block diagram showing Embodiment 1 of the converter device according to the present invention. The converter device 1 shown in FIG. 1 is manufactured with a diode bridge 3 for full-wave rectification of a single-phase AC voltage supplied from a single-phase commercial power supply 2 and components of the same standard with the same capacity and the same specifications. The full-wave rectified voltage output from the diode bridge 3 is switched by the number corresponding to the compressor capacity of the compressor and generates a DC voltage of a specified voltage value and a sine wave current matching the power supply phase,
A plurality of single-phase converter modules 4 for power factor improvement and harmonic suppression, and an inverter device 6 while smoothing the DC voltage output from each of the single-phase converter modules 4
And a converter on / off circuit 8 for turning on / off each single-phase converter module 4 in accordance with the operating state of the compressor 7 by driving the compressor 7 of the air conditioner. The diode bridge 3 causes the single-phase AC voltage supplied from the single-phase commercial power supply 2 to be full-wave rectified, and the converter on / off circuit 8 detects the operating state (operating state) of the air conditioner. Based on the detection result, some of the single-phase converter modules 4 are turned on, the full-wave rectified voltage output from the diode bridge 3 is switched, and the obtained DC voltage is smoothed and designated. The DC voltage having the obtained voltage value and current value is supplied to the inverter device 6.

The diode bridge 3 is provided with four rectifying diodes 9 connected in a bridge as shown in FIG. 2, and performs full-wave rectification of a single-phase AC voltage output from the single-phase commercial power supply 2. Is supplied to each single-phase converter module 4.

Each of the single-phase converter modules 4 has a metal substrate 10 having a high heat dissipation as shown in FIG.
The diode bridge 3 is disposed on the metal substrate 10.
A converter circuit 11 that performs switching of the full-wave rectified voltage output from the converter to perform at least one of generation of a specified DC voltage, power factor improvement or harmonic suppression, and supplies the smoothed capacitor 5 to the converter circuit 11, While supplying a current value detection signal indicating a current value input to the converter circuit 11 to the converter on / off circuit 8, when the converter on / off circuit 8 supplies an on instruction signal, The voltage value and the current value of the DC voltage supplied from the circuit 11 to the smoothing capacitor 5 are compared with the preset voltage value and the preset current value, and the switching operation of the converter circuit 11 is performed based on these comparison results. A control circuit 12 for controlling these metal substrates 10,
A resin 13 is molded so as to cover the converter circuit 11 and the control circuit 12. The control circuit 12 outputs a current value detection signal indicating a current value input to the converter circuit 11 to the converter on / off circuit 8. When an on-instruction signal is supplied from the converter on / off circuit 8 while monitoring the voltage value of the DC voltage supplied to the smoothing capacitor 5 and the input current value, based on the monitoring result, The converter circuit 11 is selectively controlled to switch the full-wave rectified voltage supplied from the diode bridge 3, and to supply the obtained DC voltage to the smoothing capacitor 5.

The converter circuit 11 includes a diode bridge 3, a current value detecting resistor (shunt resistor) 14 for detecting a current value, a control circuit 12, a semiconductor switching element 15, a reactor 16, and a first recovery diode 17 This is a one-step boost converter circuit comprising:

Then, the current value detecting resistor 14
When an ON signal is output from the control circuit 12 while detecting the current value of the DC voltage supplied to the smoothing capacitor 5 and supplying the current value detection signal to the control circuit 12,
The semiconductor switching element 15 is turned on, a current is caused to flow through the reactor 16, and when an ON signal is no longer output from the control circuit 12, a back electromotive voltage is generated according to the electromagnetic energy stored in the reactor 16. hand,
Reactor 16 → Fast recovery diode 17
→ A counter electromotive voltage (DC voltage) is supplied to the smoothing capacitor 5 through the path of the smoothing capacitor 5, the voltage is boosted to a set DC voltage, smoothed, and then supplied to the inverter device 6.

The control circuit 12 takes in the current value detection signal output from the current value detection resistor 14 and supplies it to the converter on / off circuit 8, and is provided on the cathode side of the first recovery diode 17. Using the detected voltage detection point 18, the smoothing capacitor 5
And a voltage detection signal captured by the input unit 19 when the converter ON / OFF circuit 8 outputs an ON instruction signal. Compares the voltage value indicated by and the current value indicated by the current value detection signal with the set voltage value and the set current value set by the setting means, and sets the voltage value and the voltage value detection signal set by the setting means. A calculation unit 20 for determining a switching period, a pulse width, and the like necessary to match the voltage value indicated by the symbol, and an ON signal having a specified pulse width with a switching period corresponding to the calculation result of the calculation unit 20 And the semiconductor switching element 15
And an output unit 21 for turning on / off the power supply.

The converter on / off circuit 8 includes an input section 22 for receiving a current value detection signal output from each single-phase converter module 4 as shown in FIG. The total current value is obtained by adding the current value indicated by the detection signal (the current value of the DC voltage output from each converter circuit 11), and the total current value is discriminated by a level, to which level range the total current value belongs. And an operation unit 23 for determining the operation number of each single-phase converter module 4 in accordance with the determination result,
An output unit 24 for selecting at least one of the single-phase converter modules 4 in accordance with the number of operations obtained by the arithmetic unit 23 and supplying an ON instruction signal; 4 to obtain the total current value by adding the respective current values indicated by the current value detection signals, and discriminate the level of the total current value to determine the level of the total current value. It is determined whether the single-phase converter module 4 belongs to the range, and in accordance with the result of the determination, an on-instruction signal is supplied to one of the single-phase converter modules 4 at any time, so as to be turned on. At the time of low load that does not require power factor improvement and harmonic suppression, all converter modules may be turned off and used simply as a capacitor input type rectifier circuit.

As described above, in the first embodiment, when the compressor capacity of the air conditioner is large, the number of single-phase converter modules 4 is increased, and when the compressor capacity of the air conditioner is small, the single-phase converter module 4 is increased. Since the DC voltage of the optimum current value and voltage value is supplied to the compressor 7 of each air conditioner simply by reducing the number of the air conditioners 4, even when the compressor capacity of the air conditioner is large or small. However, one or more single-phase converter modules 4 each having a single specification constituted by a semiconductor switching element 15 having a small capacity are combined to generate a DC voltage having a specified voltage value from a single-phase AC voltage. It is possible to stably drive the compressor 7 of the air conditioner by performing at least one of the efficiency improvement and the harmonic suppression. Can be, this by the entire apparatus of the material costs, development costs, and greatly reduce the time and effort such as inventory management, it is possible to reduce the cost down.

At this time, as each single-phase converter module 4, a large-scale, inexpensive single-phase converter module for lighting equipment of several hundred watts, which is inexpensive, or the largest number of air conditioners among air conditioners, 2.5KW-4.
By using a single-phase converter module capable of inputting a current of up to about 20 A manufactured for a 0 kW home air conditioner, the manufacturing cost can be further reduced.

Also, in the first embodiment, the converter on / off circuit 8 monitors the current value of the DC voltage output from each single-phase / single-phase converter module 4,
Since the number of operating single-phase converter modules 4 is determined according to the total current value obtained by adding the current values of the DC voltages output from the single-phase converter modules 4, the compressor 7 of the air conditioner can be used. At the time of driving, even if the load condition (input current) changes over time in accordance with a change in the air condition or the like, the current value input to each single-phase converter module 4 should not be out of the set current value range. Thus, the operation of each single-phase converter module 4 can be stabilized.

For example, if the device to be driven is an air conditioner, since the deviation between the set temperature at the time of starting and the room temperature is large, when the operation of the air conditioner is started, each single-phase When the current value input to the converter module 4 is large, and thereafter, when the room temperature reaches the target set temperature, or when the air conditioner is switched to the blower operation, the current value input to each single-phase converter module 4 is reduced. Become smaller.

At this time, this is detected by the converter on / off circuit 8, and the current value input to each single-phase / single-phase converter module 4 becomes equal to or less than the specified current value.
Some operations of each of the single-phase converter modules 4 can be stopped so as not to cause an unstable operation, whereby the operations of the single-phase converter modules 4 that are turned on can be stabilized. At the same time, wasteful power consumption can be suppressed, and energy saving can be promoted.

When some of the single-phase converter modules 4 are turned off by the converter on / off circuit 8, no boosting operation is performed by the single-phase converter modules 4 which are turned off. Between the full-wave rectified voltage input to the single-phase converter module 4 in the off state and the DC voltage output from the single-phase converter module 4 in the on state,
The following equation holds, and the first recovery diode 17 of the single-phase converter module 4 in the off state is reverse-biased so that no current flows to the single-phase converter module 4 in the off state. This makes it possible to control the number of parallel operations by a simple control in which only some of the single-phase to single-phase converter modules 4 are turned off.

Vout> Vin (1) where Vout is a voltage value of a DC voltage output from the single-phase converter module 4 which is turned on. Vin is a full-wave rectified voltage by a diode bridge.

Further, in the first embodiment, as the single-phase converter module 4, a metal substrate 10, a converter circuit 11, and a control circuit 12 molded with a resin 13 and integrated are used. Therefore, the components can be easily arranged in parallel, and the operation can be stabilized even in a poor environment such as a place with high humidity, and the heat dissipation can be greatly improved.

In the first embodiment, the resin 1
3, the converter circuit 1 including the reactor 16
2 The whole is molded, but when a DC voltage is supplied to equipment with large current capacity, such as a large air conditioner, a large reactor with a large shape and weight must be used. If not, the reactor 16 is used as an external component, and the remaining part is
Then, you may make it mold.

In the first embodiment, since a plurality of single-phase converter modules 4 are connected in parallel, each of the single-phase converter modules 4 such as the control circuit 12 and the semiconductor switching element 15 is connected. When the characteristics of the device elements such as the semiconductor integrated device, the first recovery diode 17, the current value detection resistor 14, and the reactor 16 vary, the current value input from each single-phase converter module 4 may become unbalanced. is there.

In such a case, an IGTB (insulated gate bipolar transi
The currents input to the single-phase converter modules 4 are made uniform by the self-reducing action of the IGTB.

In the first embodiment, the DC voltage output from each converter circuit 11 matches the set voltage value set by the setting means, and
In order to improve the power factor and suppress harmonics, the semiconductor switching element 15 is switched at a high speed at a switching frequency sufficiently higher than the frequency of the AC voltage output from the commercial power supply 2. The semiconductor switching element 15 is controlled one to several times within a specific phase angle range based on a zero point of the DC voltage (pulse-type DC voltage) output from the diode bridge 3 by a control method other than the method. The switching of the DC voltage output from each converter circuit 11 is performed only by making the voltage value of the DC voltage coincide with the set voltage value set by the setting means, or by only improving the power factor. At least one of improvement and harmonic suppression may be performed.

Embodiment 2 FIG. 5 is a block diagram showing Embodiment 2 of the converter device according to the present invention. In this figure, the same parts as those in FIGS.
The same reference numerals are given.

The converter device 31 shown in this figure is manufactured with the same capacity and the same specifications by using components of the same standard as the reactor 33 connected to the single-phase and both-line that stores the electromagnetic energy and generates the back electromotive force, and is made of air. As many as the number corresponding to the compressor capacity of the
A plurality of single-phase converter modules 34 for interrupting the current flowing through the power supply and generating at least one of a DC voltage having a specified voltage value and a current value, power factor improvement or harmonic suppression, and each of these single-phase converter modules. While smoothing the DC voltage output from the module 34, the DC voltage is supplied to the inverter device 6 to drive the compressor 7 of the air conditioner, and the single-phase converter module 34 according to the operating state of the compressor 7. And a converter on / off circuit 8 for turning on / off the air conditioner. The converter on / off circuit 8 detects the operating state (operating state) of the air conditioner, and based on the detection result, each single-phase converter module. 34 are turned on, the current flowing through each reactor 33 is interrupted, and the The voltage is smoothed and given a voltage value, to supply the DC voltage having a current value to the inverter 6.

As shown in FIG. 6, each single-phase converter module 34 has a metal substrate 39 having high heat dissipation,
The direct-current voltage supplied via the respective reactors 33 is switched on the metal substrate 39 to generate a specified direct-current voltage using the back electromotive voltage induced in each of the reactors 33, and the smoothing capacitor 5 is generated. And a current value detection signal which is provided on the metal substrate 39 and indicates a current value inputted to the converter circuit 40, and supplies the current value detection signal to the converter on / off circuit 8, When the ON instruction signal is supplied from the / OFF circuit 8, the voltage value and the current value of the DC voltage supplied to the smoothing capacitor 5 are compared with preset voltage values and preset current values. Based on each comparison result, a control circuit 41 for controlling the switching operation of the converter circuit 40, a metal substrate 39, a converter circuit 40, And a resin 42 to be molded so as to cover the path 41, generate a current value detection signal indicating a current value input to the converter circuit 40, and generate the current value detection signal via the control circuit 41. Converter on /
When an on-instruction signal is being supplied from the converter on / off circuit 8 while being supplied to the off circuit 8, the control circuit 41 controls the converter circuit 40 to switch the DC voltage supplied via each reactor 33. Then, the specified DC voltage value is generated or the power factor is improved.

The converter circuit 40 detects an input current value, generates a current value detection signal based on the detection result, and supplies a current value detection resistor (shunt resistor) 43 to the control circuit 41. A diode bridge 46, which is composed of four rectifying diodes 44 and 45, rectifies each back electromotive force supplied from each reactor 33, and supplies it to the smoothing capacitor 5, and two rectifiers constituting the diode bridge 45. When the ON signal is output from the control circuit 41, they are connected in parallel to each other and are turned on, the current energy is accumulated in each reactor 33, and the ON signal is not output from the control circuit 41. A half-bridge type having two semiconductor switching elements 47 for generating a back electromotive voltage. A converter circuit.

Each time the ON signal of each phase is output from the control circuit 41, the semiconductor switching element 47 of each phase is output.
Is turned on, the electromagnetic energy is accumulated in the reactor 33 of each phase, and a back electromotive voltage is generated in the reactor 33 of each phase every time the ON signal of each phase is no longer output from the control circuit 41. The DC voltage obtained by the rectification by the bridge 46 is supplied to the smoothing capacitor 5, the current value of the DC voltage supplied to the smoothing capacitor 5 is detected, and the obtained current value detection signal is controlled. It is supplied to the circuit 41.

The control circuit 41 takes in the current value detection signal output from the current value detection resistor 43, supplies it to the converter on / off circuit 8, and controls the voltage provided on the output terminal side of the diode bridge 46. When an on-instruction signal is output from the input unit 49 for taking in the voltage value (voltage value detection signal) of the DC voltage supplied from the detection point 48 to the smoothing capacitor 5 and the converter on / off circuit 8, The voltage value indicated by the voltage value detection signal and the current value indicated by the current value detection signal received by the input unit 49 are compared with the set voltage value and the set current value set by the setting means, and the set current range is set. Within the switching period and the pulse required to match the set voltage value set by the setting means with the voltage value indicated by the voltage value detection signal. And an output unit 51 for generating an ON signal of a designated pulse width at a switching cycle corresponding to the operation result of the operation unit 50 and turning on / off the semiconductor switching element 47. I have.

Then, a current value detection signal output from the current value detection resistor 43 is fetched by the input section 49,
This is supplied to the converter on / off circuit 8, and the voltage value (voltage value detection signal) of the DC voltage supplied to the smoothing capacitor 5 is supplied using the voltage detection point 48 provided on the output side of the diode bridge 46. When the converter ON / OFF circuit 8 is outputting the on-instruction signal while taking in, the arithmetic unit 50 sets the voltage value indicated by the voltage value detection signal, the current value indicated by the current value detection signal, and the setting means. The set voltage value set by the setting switch is compared with the set current value, and within the set current range, the set voltage value set by the setting switch is matched with the voltage value indicated by the voltage value detection signal. A switching cycle, a pulse width, and the like necessary for the semiconductor device are obtained, and an ON signal corresponding to the pulse width is output from the output unit 51 at the switching cycle. The ring element 47 is turned on / off.

The converter on / off circuit 8 includes an input section 22 for receiving a current value detection signal output from each single-phase converter module 34 as shown in FIG. The current value indicated by the detection signal (the current value of the DC voltage output from each converter circuit 40) is added to obtain the total current value.
The level of the total current value is discriminated to determine which level range the total current value belongs to, and according to the result of the determination, the operation unit 23 that determines the number of operations of each single-phase converter module 34
And an output unit 24 for selecting one or more of the single-phase converter modules 34 in accordance with the number of operations obtained by the operation unit 23 and supplying an ON instruction signal. The current value detection signal output from the converter module 34 is taken in, the current values indicated by the respective current value detection signals are added to obtain a total current value, and the total current value is level-discriminated to obtain a total current value. It is determined which level range it belongs to, and in accordance with the result of this determination, an on-instruction signal is supplied to some of the single-phase converter modules 34 at some point to bring them into the on-state. Similarly, when the load is low, all the converter modules may be turned off and used as a simple capacitor input type rectifier circuit.

As described above, in the second embodiment, when the compressor capacity of the air conditioner is large, the number of single-phase converter modules 34 is increased, and when the compressor capacity of the air conditioner is small, the single-phase converter module 34 is increased. Since the DC voltage of the optimum current value and voltage value is supplied to the compressor 7 of each air conditioner simply by reducing the number of the air conditioners 34, even when the compressor capacity of the air conditioner is large or small. However, by combining one or more single-phase converter modules 34 of a single specification composed of rectifying diodes 44 and 45 having a small capacity, a semiconductor switching element 47 having a small capacity, and the like, a DC voltage of a designated voltage value is obtained. By performing at least one of generation, power factor improvement, and harmonic suppression, the air conditioner Tsu it is possible to drive the support 7, whereby the entire apparatus material costs, development costs, and greatly reduce the time and effort such as inventory management, it is possible to reduce the cost down.

In the second embodiment, the converter on / off circuit 8 monitors the current value of the DC voltage output from each single-phase / single-phase converter module 34, and The operation number of each single-phase converter module 34 is determined according to the total current value obtained by adding the current value of the DC voltage to be applied. Therefore, when driving the compressor 7 of the air conditioner, changes in air conditions and the like occur. Accordingly, even if the load condition (input current) changes over time, the current value of the DC voltage output from each single-phase converter module 34 does not deviate from the set current value range. The operation of the module 34 can be stabilized.

Thus, even when a DC voltage is supplied to a device such as an air conditioner in which a current value required at the time of startup and a current value required in a steady state are significantly different from each other, the converter on / off circuit 8 can be used. A necessary current value is detected, and some operations of each of the single-phase converter modules 34 are performed so that the current value of the DC voltage output from each of the single-phase converter modules 34 does not become lower than the current value at which unstable operation is performed. Can be stopped, thereby stabilizing the operation of each single-phase converter module 34 turned on, suppressing unnecessary power consumption, and promoting energy saving.

When some of the single-phase converter modules 34 are turned off by the converter on / off circuit 8, the boost operation is not performed by the single-phase converter modules 34 that are turned off. The following equation holds between the full-wave rectified voltage input to the single-phase single-phase converter module 34 turned off and the DC voltage output from the single-phase converter module 34 turned on, Diode bridge 4 of single-phase converter module 34 turned off
6, each rectifier diode 44 is reverse-biased and turned off.
The current can be prevented from flowing to the four sides, whereby the number of parallel operations can be controlled with a simple control of turning off some of the single-phase converter modules 34.

Vout> Vin (2) where, Vout: the voltage value of the DC voltage output from the single-phase converter module 34 in the ON state Vin: full-wave rectified voltage by the diode bridge

In the second embodiment, as the single-phase converter module 34, a metal substrate 39, a converter circuit 40, and a control circuit 41 are molded with a resin 42 and integrated to be used. Therefore, the components can be easily arranged in parallel, and the operation can be stabilized even in a poor environment such as a humid place, and the heat dissipation can be greatly improved.

In the second embodiment described above, since a plurality of single-phase converter modules 34 are connected in parallel, each of the control circuit 41 and the semiconductor switching element 47 constituting each single-phase converter module 34 is connected. When the characteristics of the device elements such as the semiconductor integrated device, the rectifier diodes 44 and 45, and the current value detecting resistor 43 vary, the current value of the DC voltage output from each single-phase converter module 34 becomes unbalanced. There is.

In such a case, an IGTB or the like is used as the semiconductor switching element 47.
Due to the self-reduction function of the, the currents input to the single-phase converter modules 34 are equalized.

In the second embodiment, the DC voltage output from each converter circuit 40 matches the set voltage value set by the setting means, and
In order to improve the power factor and suppress harmonics, the semiconductor switching element 47 is switched at a high speed at a switching frequency sufficiently higher than the frequency of the AC voltage output from the commercial power supply 2. By controlling the semiconductor switching element 47 once to several times within a specific phase angle range based on the zero-cross point of the AC voltage output from the commercial power supply 2, each converter circuit 40 At least one of the generation of the specified DC voltage, the power factor improvement, and the harmonic suppression, such as making the voltage value of the DC voltage output from May be performed.

Embodiment 3 FIG. 8 is a block diagram showing Embodiment 3 of the converter device according to the present invention. In this figure, the same parts as those in FIGS.
The same reference numerals are given.

The converter device 61 shown in this figure is connected to a three-phase commercial power supply 62 in a delta connection so as to perform three-wave rectification on the AC voltage of each phase supplied from the three-phase commercial power supply 62. A diode bridge 64 and three three-phase switches for switching the full-wave rectified voltage for each phase output from each of these diode bridges 64 to perform at least one of generation of a specified DC voltage, power factor improvement or harmonic suppression. A single-phase converter module 4 and a smoothing capacitor 5 that supplies a DC voltage output from each of the single-phase converter modules 4 to an inverter device 6 while driving the compressor 7 of the air conditioner while smoothing the DC voltage. , The three-phase AC voltage supplied from the three-phase commercial power supply 62 by each diode bridge 64 for each phase,
While performing full-wave rectification, each full-wave rectified voltage output from each diode bridge 64 is switched for each phase by three single-phase converter modules 4 used for a single-phase power supply voltage. The obtained DC voltage is smoothed and supplied to the inverter device 6.

Each of the diode bridges 64 includes three rectifying diodes 63. The three-phase AC voltage output from the three-phase commercial power supply 62 is full-wave rectified for each phase, and A rectified voltage (pulse flow type DC voltage) is generated and supplied to the single-phase converter module 4 of each phase.

Each of the single-phase converter modules 4 has a metal substrate 10 having high heat dissipation as shown in FIG.
A current detecting resistor 14 disposed on the metal substrate 10;
The semiconductor switching element 15, the reactor 16, and the diode 17 for fast recovery are configured to switch a DC voltage output from a diode bridge 64 of a corresponding phase to generate a DC voltage having a specified voltage value and current value. , A converter circuit 11 that supplies the smoothing capacitor 5, and an input unit 19, an arithmetic unit 20, and an output unit 21 disposed on the metal substrate 10, and a voltage value of a DC voltage obtained by the voltage detection point 18.
The control circuit 12 controls the switching operation of the converter circuit 11 based on the comparison results of comparing the current value obtained by the current value detection resistor 14 with a preset set voltage value and a set current value. , These metal substrates 1
0, so as to cover the converter circuit 11 and the control circuit 12,
And a resin 13 to be molded.
Thus, while monitoring the voltage value and the current value of the DC voltage output from the converter circuit 11, the converter circuit 11 is controlled based on the monitoring result, and the specified voltage value is supplied to the smoothing capacitor 5.

As described above, in the third embodiment, three single-phase / single-phase converter modules 4 used for a single-phase power supply voltage are used, and the three-phase power supplied from the diode bridge 64 of each phase is used. After the phase DC voltage is switched for each phase, at least one of generation of a specified DC voltage, power factor improvement or harmonic suppression is performed, and this is supplied to the smoothing capacitor 5 and smoothed. And the inverter device 6, so that only three single-phase converter modules 4 of a single specification composed of small-capacity semiconductor switching elements 15 and the like are combined and designated from a three-phase AC voltage. It is possible to drive the compressor 7 of the air conditioner by performing at least one of the generation of a DC voltage of a given voltage value, power factor improvement or harmonic suppression, Material cost of the entire apparatus by Les, development costs, and greatly reduce the time and effort such as inventory management, it is possible to reduce the cost down.

In the third embodiment, as the single-phase converter module 4, a metal substrate 10, a converter circuit 11, and a control circuit 12 molded with a resin 13 and integrated are used. Therefore, the delta connection can be facilitated as a component, the operation can be stabilized even in a poor environment such as a humid place, and the heat dissipation can be greatly improved.

In the third embodiment, the resin 1
3, the converter circuit 1 including the reactor 16
2 The whole is molded, but when a DC voltage is supplied to equipment with large current capacity, such as a large air conditioner, a large reactor with a large shape and weight must be used. If not, the reactor 16 may be used as an external component, and the remaining portion may be molded with resin.

In the third embodiment, since a plurality of single-phase converter modules 4 are connected in delta, each semiconductor circuit such as the control circuit 12 and the semiconductor switching element 15 constituting each single-phase converter module 4 is connected. When the characteristics of the device elements such as the integrated element, the first recovery diode 17, the current value detecting resistor 14, and the reactor 16 vary, the current value input to each single-phase converter module 4 may be unbalanced. .

In such a case, IGTB or the like is used as the semiconductor switching element 15,
The current input to each single-phase converter module 4 is made uniform by the self-reducing current effect of the.

In the third embodiment described above, the DC voltage output from each converter circuit 11 is set so as to match the set voltage value set by the setting means, and
In order to improve the power factor and suppress harmonics, the semiconductor switching element 15 is switched at a high speed at a switching frequency sufficiently higher than the frequency of the AC voltage output from the commercial power supply 62. The semiconductor switching element 15 is controlled one to several times within a specific phase angle range based on a zero point of the DC voltage (pulse-type DC voltage) output from the diode bridge 3 by a control method other than the method. The switching of the DC voltage output from each converter circuit 11 is performed only by making the voltage value of the DC voltage coincide with the set voltage value set by the setting means, or by only improving the power factor. At least one of improvement and harmonic suppression may be performed.

In the third embodiment, a single-phase converter module having the circuit configuration shown in FIG. 9 is used as each single-phase converter module 4.
A single-phase converter module other than such a circuit configuration,
For example, as shown in FIG. 10, a single-phase converter module 34 with an external reactor may be used.

In the third embodiment, three rectifying diodes 63 are used as the diode bridges 64 for each phase. However, as shown in FIG. 11, four rectifying diodes 65 are used. A general-purpose diode bridge 66 may be used to further reduce the manufacturing cost.

Embodiment 4 FIG. 12 is a block diagram showing Embodiment 4 of the converter device according to the present invention.
In this figure, the same parts as those in FIGS. 1, 3 and 8 are denoted by the same reference numerals.

The converter device 71 shown in FIG. 9 is delta-connected to the three-phase commercial power supply 62, and performs full-wave rectification of the three-phase AC voltage supplied from the three-phase commercial power supply 62 for each phase. It is constituted by three diode bridges 74 and a plurality of single-phase converter modules 4 connected in parallel, and switches full-wave rectified voltages for each phase output from each diode bridge 74 to output a specified DC voltage. Three converter module groups 75 that perform at least one of generation, power factor improvement, or harmonic suppression, and supply the air to the inverter device 6 while smoothing the DC voltage output from each of the converter module groups 75, Smoothing condenser 5 that drives compressor 7 of the harmonic machine
And a converter on / off circuit 8 for turning on / off each single-phase converter module 4 constituting each converter module group 75 according to the compressor capacity of the air conditioner, and a diode bridge 74 for each phase. Thus, the three-phase AC voltage supplied from the three-phase commercial power supply 62 is subjected to full-wave rectification for each phase, and the operating state of the air conditioner is detected by the converter on / off circuit 8. Based on the above, some of the single-phase converter modules 4 constituting each converter module group 75 are turned on, and each diode bridge 74 is turned on.
Is switched for each phase for each phase, the obtained DC voltage is smoothed, and the designated DC voltage is supplied to the inverter device 6.

Each of the diode bridges 74 includes three rectifying diodes 73. The three-phase AC voltage output from the three-phase commercial power supply 62 is subjected to full-wave rectification for each phase, and this is rectified. It is supplied to the converter module group 75 of each phase.

As shown in FIG. 13, each single-phase converter module 4 constituting each converter module group 75 has a metal substrate 10 having high heat dissipation, a current detecting resistor 14 disposed on the metal substrate 10, A full-wave rectified voltage output from a diode bridge 74 of the corresponding phase is switched by a semiconductor switching element 15, a reactor 16, and a diode 17 for fast recovery to generate a specified DC voltage. Converter circuit 11 to be supplied and metal substrate 1
Input unit 19, arithmetic unit 20, output unit 21 arranged on 0
The current value detection signal obtained by the current value detection resistor 14 is fetched and supplied to the converter on / off circuit 8, and the current value and the voltage detection point 18 indicated by the current value detection signal are used. The control circuit 12 controls the switching operation of the converter circuit 11 on the basis of the comparison results of the voltage value of the obtained DC voltage and the preset set voltage value and set current value. And a resin 13 that is molded so as to cover the converter circuit 11 and the control circuit 12.
While supplying a current value detection signal indicating the current value of the DC voltage supplied from 1 to the smoothing capacitor 5 to the converter on / off circuit 8 while the converter on / off circuit 8 supplies an on instruction signal, While monitoring the voltage value and input current value of the DC voltage supplied to the smoothing capacitor 5, based on the monitoring result, the converter circuit 11 is controlled to switch the full-wave rectified voltage supplied from the diode bridge 3, The obtained DC voltage is supplied to the smoothing capacitor 5.

The converter on / off circuit 8 includes an input section 22 for receiving a current value detection signal output from each single-phase converter module 4 as shown in FIG. The current value indicated by the detection signal (current value input to each converter circuit 11) is added to obtain the total current value, and the total current value is discriminated in level to determine which level range the total current value belongs to. An operation unit 23 that determines the number of operations for each converter module group 75 according to the determination result, and a single-phase operation for each converter module group 75 according to the number of operations obtained by the operation unit 23. And an output unit 24 for selecting one or more of the converter modules 4 and supplying an ON instruction signal. The value detection signal is taken in, the current values indicated by these current value detection signals are added to obtain a total current value, and the total current value is discriminated in level to determine which level range the total current value belongs to. Then, the number of operations for each converter module group 75 is determined according to the determination result, and an ON instruction signal is supplied to each single-phase converter module 4 of each converter module group 75 to be turned on. Similarly, when the load is low, the operation may be such that all the devices are off. In addition, in order to avoid imbalance between the phases, it is also desirable to make the number of converter modules operating for each phase uniform.

As described above, in the fourth embodiment, when the compressor capacity of the air conditioner is large, the number of single-phase converter modules 4 constituting each converter module group 75 is increased, and the compressor capacity of the air conditioner is increased. Is smaller, the DC voltage of the optimal current value and voltage value is supplied to the compressor 7 of each air conditioner simply by reducing the number of the single-phase converter modules 4 constituting each converter module group 75. Therefore, even when the compressor capacity of the air conditioner is large or small, the semiconductor switching element 15 having a small capacity can be used.
One or more single-phase converter modules 4 each having a single specification are combined to generate at least one of a DC voltage having a specified voltage value, a power factor improvement, and a harmonic suppression from a three-phase AC voltage. In this way, the compressor 7 of the air conditioner can be driven, thereby greatly reducing the material costs, development costs, inventory management, and the like of the entire apparatus, thereby achieving cost reduction.

Further, in the fourth embodiment, the converter on / off circuit 8 monitors the current value of the DC voltage output from each converter module group 75, and controls the DC voltage output from each converter module group 75. The operation number of the single-phase converter modules 4 is determined for each converter module group 75 according to the total current value obtained by adding the current values of the above. Accordingly, even if the load condition (input current) changes over time, the current value input to each single-phase converter module 4 is prevented from becoming lower than the current value for stable operation, and the operation is stabilized. Can be done.

Thus, even in the case of a device such as an air conditioner in which the current value required at the time of startup is significantly different from the current value required at the time of steady operation, the converter on / off circuit 8 can be used.
Then, a necessary current value is detected, and some operations of each of the single-phase converter modules 4 are stopped so that the current value input to each of the single-phase converter modules 4 does not become lower than the current value for stable operation. In addition, it is possible to stabilize the operation of each single-phase converter module 4 that is turned on, suppress unnecessary power consumption, and promote energy saving.

When some of the single-phase converter modules 4 are turned off by the converter on / off circuit 8, no boosting operation is performed by the single-phase converter modules 4 that are turned off. The following equation is established between the full-wave rectified voltage input to the single-phase converter module 4 turned off and the output DC voltage, and the first recovery diode 17 of the single-phase converter module 4 turned off is Are reverse-biased, so that no current flows to the single-phase converter module 4 which is turned off, so that only a part of each single-phase single-phase converter module 4 is turned off. With simple control, the number of parallel operations can be controlled.

Vout> Vin (3) where, Vout: the voltage value of the DC voltage output from the single-phase converter module 4 which is turned on Vin: the full-wave rectified voltage by the diode bridge

In the fourth embodiment, since the plurality of single-phase converter modules 4 are connected in parallel, each of the control circuits 12 and the semiconductor switching elements 15 and the like constituting each single-phase converter module 4 is provided. When the characteristics of the device elements such as the semiconductor integrated device, the first recovery diode 17, the current value detection resistor 14, and the reactor 16 vary, the current value input to each single-phase converter module 4 may become unbalanced. is there.

In such a case, IGTB or the like is used as the semiconductor switching element 15, and the IGTB is used.
The current input to each single-phase converter module 4 is made uniform by the self-reducing current effect of the.

In the above-described fourth embodiment, a single-phase converter module 4 in which a metal substrate 10, a converter circuit 11, and a control circuit 12 are molded with a resin 13 and integrated is used. Therefore, even in a poor environment such as a place with high humidity, the operation can be stabilized and the heat dissipation can be greatly improved.

In the fourth embodiment, the resin 1
3, the converter circuit 1 including the reactor 16
2 The whole is molded, but when a DC voltage is supplied to equipment with large current capacity, such as a large air conditioner, a large reactor with a large shape and weight must be used. If not, the reactor 16 may be an external component, and the remaining portion may be molded with resin.

In the fourth embodiment, the AC voltage supplied from the commercial power supply 62 is set such that the DC voltage value output from each converter circuit 11 matches the voltage value set by the setting means. At a switching frequency sufficiently higher than the frequency of the voltage, the semiconductor switching element 1
5 is switched at a high speed. However, a control method other than such a control method, for example, a specific phase based on the zero point of the DC voltage (pulsating DC voltage) output from the diode bridge 74 is used. Within the angular range, 1
The semiconductor switching element may be switched several times to make the voltage value of the DC voltage output from each converter circuit 11 coincide with the set voltage value set by the setting means.

In the fourth embodiment, a single-phase converter module having the circuit configuration shown in FIG. 13 is used as each single-phase converter module 4.
A single-phase converter module other than such a circuit configuration,
For example, a half-bridge type single-phase converter module 34 may be used as shown in FIG.

Further, in the fourth embodiment, three rectifying diodes 73 are used as the diode bridges 74 for each phase. However, a general-purpose diode bridge composed of four rectifying diodes is used. It may be used to further reduce the manufacturing cost.

[0101]

As described above, the converter device according to the present invention is driven by combining one or more single-phase converter modules of a single specification composed of small-capacity semiconductor switching elements and the like. Even when the capacity of the device is small or large, it is possible to drive the device to be driven by performing at least one of generation of a specified DC voltage, power factor improvement or harmonic suppression, As a result, time and labor such as material costs, development costs, and inventory management of the entire apparatus can be significantly reduced, and costs can be reduced.

In the converter device according to the next invention,
Delta connection of single-phase single-phase converter modules composed of small-capacity semiconductor switching elements, etc., generates DC voltage of specified voltage value from three-phase power supply voltage, improves power factor, or suppresses harmonics Can be performed to drive the equipment to be driven, thereby greatly reducing the cost of materials, development costs, inventory management, etc. of the entire device, and reducing costs. it can.

In the converter device according to the next invention,
One or more single-phase converter modules of a single specification composed of small-capacity semiconductor switching elements, etc. A DC voltage having a specified voltage value can be generated from a three-phase power supply voltage to drive a device to be driven, thereby reducing the material costs, development costs, inventory management, etc. of the entire device. The cost can be reduced by greatly reducing the cost.

In the converter according to the next invention,
Even if the characteristics of the components that make up the single-phase converter module vary, the characteristics of the DC voltage output from each single-phase converter module can be matched, which results in material costs, development costs, inventory control, etc. for the entire system. Can greatly reduce the labor and cost.

In the converter device according to the next invention,
Dramatically improve durability against external environmental changes,
The conversion operation can be stabilized, thereby greatly reducing maintenance costs, development costs, inventory management, and the like of the entire apparatus, and can reduce costs.

In the converter device according to the next invention,
The device to be driven can be driven.Even if the device to be driven is a small air conditioner or a large air conditioner, a small-capacity rectifying diode and a small-capacity semiconductor Combining one or more single-phase converter modules with a single specification composed of switching elements, etc., and supplying a DC voltage with an optimal current value and an optimal voltage value to a compressor of an air conditioner,
This can be driven, thereby significantly reducing the cost of material, development, inventory control, and the like of the entire air conditioner, thereby achieving cost reduction.

[Brief description of the drawings]

FIG. 1 is a first embodiment of a converter device according to the present invention.
FIG.

FIG. 2 is a circuit diagram showing a detailed configuration example of the diode bridge shown in FIG.

FIG. 3 is a block diagram showing a detailed circuit configuration example of the single-phase converter module shown in FIG.

FIG. 4 is a block diagram illustrating a detailed circuit configuration example of a converter on / off circuit illustrated in FIG. 1;

FIG. 5 is a second embodiment of the converter device according to the present invention.
FIG.

FIG. 6 is a block diagram showing a detailed circuit configuration example of the single-phase converter module shown in FIG.

FIG. 7 is a block diagram illustrating a detailed circuit configuration example of a converter on / off circuit illustrated in FIG. 5;

FIG. 8 is a third embodiment of the converter device according to the present invention.
FIG.

FIG. 9 is a block diagram illustrating a detailed circuit configuration example of the single-phase converter module illustrated in FIG. 8;

FIG. 10 is a block diagram showing another example of a circuit configuration used as the single-phase converter module shown in FIG.

FIG. 11 is a circuit diagram showing another configuration example used as the diode bridge shown in FIG.

FIG. 12 is a block diagram showing Embodiment 4 of a converter device according to the present invention.

13 is a block diagram showing a detailed circuit configuration example of the single-phase converter module shown in FIG.

14 is a block diagram illustrating a detailed circuit configuration example of a converter on / off circuit illustrated in FIG.

FIG. 15 is a block diagram showing another example of the circuit configuration used as the single-phase converter module shown in FIG.

FIG. 16 is a block diagram showing an example of a conventionally known converter device.

FIG. 17 is a block diagram showing another example of a conventionally known converter device.

[Explanation of symbols]

1 converter device, 2 commercial power supply, 3 diode bridge, 4 single-phase converter module, 5 smoothing capacitor, 6 inverter device, 7 compressor, 8
Converter on / off circuit, 9 rectifier diode, 1
0 metal substrate, 11 converter circuit, 12 control circuit, 13 resin, 14 current value detection resistor, 15 semiconductor switching element, 16 reactor, 17 fast recovery diode, 18 voltage detection point,
Reference Signs List 19 input section, 20 operation section, 21 output section, 22 input section, 23 operation section, 24 output section, 31 converter device, 33 reactor, 34 single-phase converter module, 39 metal substrate, 40 converter circuit, 41 control circuit, 42 Resin, 43 current value detecting resistor, 44 rectifying diode, 45 rectifying diode, 46 diode bridge, 47 semiconductor switching element, 48
Voltage detection point, 49 input unit, 50 calculation unit, 51
Output unit, 61 converter device, 62 commercial power supply, 6
3 rectifier diode, 64 diode bridge, 6
5 Rectifier diode, 71 Converter device, 73
Rectifier diode, 74 Diode bridge, 75
Converter module group.

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference)

Claims (7)

[Claims] 1. A single-phase converter device having the same capacity and the same capacity for switching an input power supply voltage and performing at least one of generation of a DC voltage having a specified voltage value, power factor improvement or harmonic suppression. A converter device comprising a combination of a plurality of single-phase converter modules manufactured according to specifications, for performing at least one of generation of a DC voltage having a specified voltage value, power factor improvement or harmonic suppression. 2. A three-phase converter device having the same capacity and the same capacity for switching an input power supply voltage and performing at least one of generation of a DC voltage having a specified voltage value, power factor improvement or harmonic suppression. A plurality of single-phase converter modules manufactured according to the specifications are connected in a delta type, and the input three-phase AC voltage is switched for each phase. A converter device for performing at least one of harmonic suppression. 3. A three-phase converter device, wherein the input power supply voltage is switched to generate a DC voltage having a specified voltage value, and the same capacity and the same capacity to perform at least one of power factor improvement or harmonic suppression. A plurality of single-phase converter modules manufactured according to the specifications are connected in parallel, three converter module groups are manufactured, and each converter module group is delta-connected to an input line,
A converter device that switches input three-phase AC voltages for each phase, and performs at least one of generation of a DC voltage having a specified voltage value, power factor improvement, and harmonic suppression. 4. The apparatus according to claim 1, further comprising a converter on / off circuit for selectively operating each single-phase converter module according to a current value input from each single-phase converter module. The converter device as described. 5. The converter device according to claim 1, wherein each single-phase converter module uses an IGTB as a switching element. 6. The converter device according to claim 1, wherein main components of each of the single-phase converter modules are modularized and used as one component. 7. The converter device according to claim 1, wherein each converter device is used in a compressor drive circuit of an air conditioner.