JPH1169883A - Controller for motor for refrigerating cycle drive unit and air conditioner therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce leakage current of a motor caused by an increase in direct current, and improve power factor, by setting any one of a short-circuit energizing mode with a forced energizing circuit which short-circuits a serial reactor on power source side of a converter device and an AC power source, and a non-short-circuiting mode which inhibits short-circuiting. SOLUTION: DC voltage is converted into PWM voltage, an inverter main circuit 18 and an inverter control circuit 35 are connected to a compressor driving motor 19, and the voltage from a converter device is detected by a DC voltage detector 21. The zero-cross point of AC voltage is connected to a zero-cross detector 14 between the power source side of a reactor L and the load side of a current transformer 12, and an energizing control circuit 16 is formed, which controls a forced energizing circuit 15 with a base drive power source. During operation in a rotational speed priority energizing mode by a current-carrying pattern setting means 42, setting of short-circuit time for holding a current value within an allowable range is changed if AC input current reaches an allowable maximum value. It is thus possible to prevent leakage current of a motor from increasing due to DC increase.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a motor for a refrigeration cycle drive device for controlling the speed of a compressor drive motor based on a difference between a room temperature and a set temperature, and more particularly to an input from an AC power supply. The present invention relates to a control device for a motor for a refrigeration cycle drive device including a power supply device for improving a power factor of a power supply, and an air conditioner using the same.

[0002]

2. Description of the Related Art Generally, a control device for a motor for a refrigeration cycle drive device converts an AC voltage supplied from an AC power supply into a DC voltage, and modulates the DC voltage by pulse width. A refrigeration cycle that supplies a compressor drive motor forming a refrigeration cycle with a reactor in the connection path to the AC power supply and forcibly short-circuits the reactor and the AC power supply to make use of the energy storage effect to improve the refrigeration cycle. There is a control device for a motor for a drive device.

A conventional control device for a motor for a refrigeration cycle drive device provided with a reactor in a connection path to an AC power supply includes:
In order to improve the power supply power factor, short-circuiting between the reactor and the AC power supply was performed over a wide range from when the AC input current was small to the maximum value. The voltage tends to increase excessively. If the duty of the pulse width modulation is reduced to suppress the increase in the voltage, the number of times of chopping increases, and there is a disadvantage that the loss increases and the leak current increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a control device for a motor for a refrigeration cycle drive device capable of easily reducing a leak current, and an air conditioner using the control device. The purpose is to provide.

[0005]

The invention according to claim 1 is
A converter device for converting an AC voltage supplied from an AC power supply to a DC voltage, an inverter device for converting the DC voltage converted by the converter device to a PWM voltage and supplying the PWM voltage to a compressor drive motor forming a refrigeration cycle, and a converter A power supply circuit including a reactor connected in series to a power supply side of the device, a switching element for forcibly short-circuiting the reactor and the AC power supply, and controlling a power supply power factor or a DC voltage by short-circuiting the forcible circuit. A control device for a motor for a refrigeration cycle drive device, comprising: an energization control pattern setting means for setting one of a short-circuit energization mode and a non-short-circuit energization mode for inhibiting short-circuit energization. According to a second aspect of the present invention, in the control device for an electric motor for a refrigeration cycle drive device according to the first aspect, the non-short-circuit conduction mode is set when the AC input current is equal to or less than a predetermined current value.

According to the invention of claim 1 or claim 2,
By operating in the non-short-circuit conduction mode when the AC input current is equal to or less than the predetermined value, there is an effect of preventing an increase in the leak current of the motor and a deterioration in the power factor due to the DC rise.

According to a third aspect of the present invention, in the control device for a motor for a refrigeration cycle driving device according to the first aspect, when the mode shifts from the non-short-circuit energizing mode to the short-circuit energizing mode, the short-circuit energizing time is gradually increased. It is characterized by the following.

According to a fourth aspect of the present invention, in the control device for an electric motor for a refrigeration cycle driving device according to the first aspect, when the mode shifts from the short-circuit energizing mode to the non-short-circuit energizing mode, the short-circuit energizing time is gradually shortened. It is characterized by the following.

According to the third aspect of the present invention, the energizing time is gradually lengthened when shifting to the energizing mode. According to the fourth aspect of the present invention, the energizing interval is gradually narrowed to return to the predetermined energizing interval. It also has the effect of preventing the humming noise of the compressor.

According to a fifth aspect of the present invention, in the control device for a refrigeration cycle drive motor according to the first aspect, when the non-short-circuit energizing mode is shifted to the short-circuit energizing mode, the short-circuit energizing is performed by a predetermined number of zero-cross points. Starting at an interval between them, and gradually narrowing the interval of short-circuit energization.

According to a sixth aspect of the present invention, there is provided a converter for converting an AC voltage supplied from an AC power supply to a DC voltage, and a DC voltage converted by the converter for converting the DC voltage to a PWM voltage to form a refrigeration cycle. An inverter device for supplying power to the machine drive motor, a reactor connected in series to the power supply side of the converter device, a forced energizing circuit including a switching element for forcibly short-circuiting the reactor and the AC power source, and an output from the converter device. A DC voltage priority energizing mode in which the DC voltage to be supplied is suppressed to a predetermined voltage value or less by short-circuit energization of the forced energizing circuit, and a rotational speed priority energizing mode in which the rotational speed of the compressor drive motor is controlled by short-circuit energizing the forced energizing circuit, Energization control pattern setting means for setting any of the short-circuit energization modes for prohibiting short-circuit energization. The control unit of the refrigeration cycle drive electric motor to. The invention according to claim 7 is a converter device that converts an AC voltage supplied from an AC power supply into a DC voltage, and a compressor drive motor that converts the DC voltage converted by the converter device into a PWM voltage to form a refrigeration cycle. An inverter device, a reactor connected in series to the power supply side of the converter device, a forced energizing circuit including a switching element that forcibly short-circuits the reactor and the AC power source, and a DC output from the converter device. DC voltage priority energization mode in which the voltage is reduced to a predetermined value or less by forcible energization circuit short-circuit energization, and rotational speed priority energization mode in which the DC voltage is increased or decreased to control the number of rotations of the compressor drive motor by forcible energization circuit short-circuit energization And among the non-short-circuit conduction modes in which the priority control is not performed, a single conduction mode or a plurality of conduction modes depending on the AC input current. Controller of the refrigeration cycle drive electric motor, characterized in that it and a power control pattern setting means for setting any one of a plurality of control patterns to select switching the energization mode.

The invention according to claim 8 is a converter device for converting an AC voltage supplied from an AC power supply to a DC voltage, and a compression device for converting the DC voltage converted by the converter device to a PWM voltage to form a refrigeration cycle. A power supply circuit including an inverter device for supplying power to the machine drive motor, a reactor connected in series to the power supply side of the converter device, a switching element for forcibly short-circuiting the reactor and the AC power supply, and a power supply for the converter device A high power factor priority energization mode in which the power factor is controlled to a predetermined value or more by short-circuit energization of the forced energization circuit; a DC voltage priority mode in which the DC voltage output from the converter device is suppressed to a predetermined value or less by short-circuit energization of the forced energization circuit; Rotation speed priority energization mode for controlling the rotation speed of the compressor drive motor by short-circuit energization of the forced energization circuit and their priorities Among the non-short-circuit energization modes that do not perform control, energization control pattern setting means for setting any one of a plurality of control patterns for selectively switching a single energization mode or a plurality of energization modes according to the AC input current, A control device for a motor for a refrigeration cycle drive device, comprising: According to a ninth aspect of the present invention, in the control device for a motor for a refrigeration cycle driving device according to the seventh or eighth aspect, for each of the energization modes, a storage means for storing, as table data, a forced energization time for an AC input current. According to a control pattern set by an AC input current detector for detecting an AC input current, a zero-cross point detecting means for detecting a zero-cross point of the AC voltage, and an energization control pattern setting means, a detection value of the AC input current detector, respectively. Energization mode switching means for turning on and off the switching element so as to energize the forcible energization circuit with a zero-cross point of the AC voltage for the short-circuit energization time stored in the storage means corresponding to the predetermined time after the zero-cross point, or , Are provided.

The invention according to claim 10 is the invention according to claims 4 to 6.
In the control device for a motor for a refrigeration cycle drive device according to any one of the above, the control pattern for selectively switching a plurality of energization modes is a non-short-circuit energization mode when the duty ratio of the PWM voltage is less than a preset duty ratio. When the duty ratio reaches the set duty ratio, the control pattern shifts to the rotation speed priority energizing mode.

[0014] The invention according to claim 11 is the invention according to claims 4 to 6.
In the control device for a motor for a refrigeration cycle drive device according to any one of the above, the control pattern for selectively switching the plurality of energization modes is a non-short-circuit energization mode when the AC input current is equal to or less than a predetermined current value, and the AC input current is predetermined. A control pattern that shifts to a DC voltage priority energizing mode when the current value is exceeded, and shifts to a rotation speed priority energizing mode when a duty ratio of the PWM voltage reaches a preset duty ratio. It is.

[0015] The invention according to claim 12 is the invention according to claims 4 to 6.
In the control device for a motor for a refrigeration cycle drive device according to any one of the above, the control pattern for selectively switching the plurality of energization modes is a non-short-circuit energization mode when the AC input current is equal to or less than a predetermined current value, and the AC input current is predetermined. It is characterized by including a control pattern for shifting to the DC voltage application mode when the current value is exceeded.

According to a thirteenth aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the sixth aspect,
The control pattern for selectively switching a plurality of energization modes is a non-short-circuit energization mode when the AC input current is equal to or less than a predetermined current value.
A control pattern for shifting to a high power factor energizing mode when the AC input current exceeds a predetermined current value is included.

According to a fourteenth aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the fourth aspect,
The control pattern for selectively switching a plurality of energization modes is a non-short-circuit energization mode when the AC input current is equal to or less than a predetermined current value.
A first control pattern for shifting to a DC voltage energizing mode when the AC input current exceeds a predetermined current value, and a non-short-circuit energizing mode when the AC input current is equal to or less than the predetermined current value, wherein the AC input current has a predetermined current value. A second control pattern that shifts to the DC voltage priority energizing mode when the voltage exceeds the duty ratio, and shifts to the rotation speed priority energizing mode when the duty ratio of the PWM voltage reaches a preset duty ratio. Is what you do.

According to a fifteenth aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the fifth aspect,
A control pattern for selectively switching between a plurality of energization modes is a first control pattern for shifting to a short-circuit energization mode when the AC input current is equal to or less than a predetermined current value and to shift to a DC voltage priority energization mode when the AC input current exceeds a predetermined current value. A second control pattern that shifts to the DC voltage priority energization mode when the AC input current exceeds a predetermined current value, and shifts to the rotation speed priority energization mode when the duty ratio of the PWM voltage reaches the set duty ratio; A third control pattern for shifting to the non-short-circuit energizing mode when the duty ratio of the PWM voltage is equal to or less than a preset duty ratio, and to shift to the rotation speed priority energizing mode when reaching the set duty ratio. Is what you do.

According to a sixteenth aspect of the present invention, in the control device for a refrigeration cycle drive motor according to the sixth aspect, the control pattern for selectively switching between a plurality of energizing modes includes:
A first control pattern in which a transition is made to a non-short circuit energizing mode when the AC input current is equal to or less than a predetermined current value, and to a DC voltage energizing mode when the AC input current exceeds a predetermined current value; In the non-short circuit energizing mode, when the AC input current exceeds a predetermined current value, the mode shifts to the DC voltage priority energizing mode, and when the duty ratio of the PWM voltage reaches the preset duty ratio, the mode is switched to the rotation speed priority energizing mode. A second control pattern to be shifted to, and a third mode to shift to the non-short-circuit energizing mode when the duty ratio of the PWM voltage is less than the preset duty ratio, and to shift to the rotation speed priority energizing mode when the duty ratio reaches the set duty ratio. When the AC input current is less than the predetermined current value, the specific short-circuit conduction mode is used.When the AC input current exceeds the predetermined current value, the high power factor conduction mode is used. A fourth control pattern shifts to,
It is characterized by consisting of.

According to any one of the fifth to sixteenth aspects, when the AC input current exceeds a predetermined value, the forced energizing mode is appropriately changed, so that the demands according to the facility environment can be reliably satisfied. it can.

The invention according to claim 17 is the invention according to claims 4 to 6
An air conditioner using the control device for an electric motor for a refrigeration cycle drive device according to any of the above, wherein a control pattern is switched depending on whether an operation mode of the air conditioner is a cooling operation or a heating operation. Things.

With such a configuration, when the AC input current exceeds a predetermined value, the forced energizing filter mode is appropriately changed, so that the requirements according to the installation environment can be satisfied without fail.

An invention according to claim 18 is an air conditioner using the control device for a motor for a refrigeration cycle drive device according to claim 5, wherein the energization control pattern setting means is configured to perform the first operation in the cooling operation mode. A control pattern is set, and a second control pattern is set in the heating operation mode.

According to this configuration, the input current can be suppressed low because the operation is mainly performed in the high power factor priority mode in the heating mode, and the operation is performed in the DC voltage priority mode in the cooling mode. There is also an effect that control at a ratio becomes possible.

According to a nineteenth aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the sixth aspect,
The control pattern of the energization control pattern setting means includes a control pattern for changing the setting to the high power factor priority mode when the AC input current reaches the maximum allowable value.

With this configuration, when the AC input current reaches the allowable maximum value, the operation is performed in the high power factor priority energizing mode, and there is also an effect that it is difficult to exceed the allowable current range.

According to a twentieth aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the seventh aspect,
Power supply frequency detection means for detecting the frequency of the AC power supply; storage means for storing an energization time correction value corresponding to the power supply frequency; and energization mode switching means for setting the power supply frequency detected by the power supply frequency detection means to a predetermined power supply frequency. When the frequency is other than the above, the short-circuit energization time is corrected by the energization time correction value.

According to a twenty-first aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the twentieth aspect, there is provided a power supply frequency detecting means for detecting a frequency of an AC power supply. The short-circuit energization time corresponding to each of the power supply frequencies is stored in the storage means.

According to the invention of claim 20 or 21, since the detected current value is appropriately corrected even when the power supply frequency changes, it is possible to sufficiently cope with a condition in which the leakage current is strictly regulated.

According to a twenty-second aspect of the present invention, in the control device for a motor for a refrigeration cycle driving device according to the twentieth aspect, the storage means stores the current detected by the AC input current detector in a current waveform according to a difference in the energization mode. The current supply mode switching means corrects the current detection value by the input current correction value in a power supply mode other than the predetermined power supply mode.

With this configuration, the current detection value is corrected by the difference in the current waveform due to the difference in the energization mode, so that it is possible to sufficiently cope with the condition that the regulation on the leak current is strict.

According to a twenty-third aspect of the present invention, in the control device for a refrigeration cycle drive motor according to any one of the twentieth to twenty-third aspects, the storage means stores a duty ratio corresponding to a command rotation speed of the compressor drive motor. In order to generate the PWM voltage, a table is provided which associates a command duty ratio with a command rotation speed. The energization mode switching means operates the compressor drive motor, the AC input current exceeds a predetermined value,
When a logical product condition that the duty ratio of the WM voltage exceeds a predetermined value is satisfied, the operation is performed in the DC voltage priority conduction mode or the high power factor priority conduction mode.

With this configuration, not only is the condition that the AC input current exceeds a predetermined value, but also the compressor drive motor is operated and the duty ratio of the PWM voltage exceeds the predetermined value. Since the power supply mode is switched in addition to the condition, there is also an effect that the power supply mode can be switched which is hardly affected by noise.

According to a twenty-fourth aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the first aspect,
The forced energizing circuit includes a fuse that cuts off the energizing circuit when the short-circuit energizing current exceeds a predetermined value.

With this configuration, it is possible to prevent a situation in which the operation of the compressor drive motor becomes inoperable due to the failure of the forced energizing circuit.

According to a twenty-fifth aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the ninth aspect,
Energization state determination means for judging that the operation state of the forced energization circuit is normal when the AC input current detected by the AC input current detector exceeds a predetermined value and the duty ratio of the PWM voltage exceeds the predetermined value It is characterized by having.

According to a twenty-sixth aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the ninth aspect,
An increase in the current value is detected at the time of switching from the non-short-circuit conduction mode to the DC voltage priority conduction mode or the high power factor priority conduction mode, and when this increase exceeds a predetermined value, the operation state of the forced conduction circuit is changed. The present invention is characterized in that an energization state determining means for determining that the power supply is normal is provided.

According to a twenty-seventh aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the ninth aspect,
An increase in the duty ratio is detected at the time of switching from the non-short-circuit conduction mode to the DC voltage priority conduction mode or the high power factor priority conduction mode, and when the increase exceeds a predetermined value, the operation state of the forced conduction circuit is changed. The present invention is characterized in that an energization state determining means for determining that the power supply is normal is provided.

According to the twenty-fifth to twenty-fourth aspects of the present invention, since the power supply state is provided with the determination means, the forced power supply state can be grasped.

According to a twenty-eighth aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the ninth aspect,
The storage means and the power supply mode switching means are constituted by dedicated ICs.

With this configuration, the storage means and the power supply mode switching means are constituted by dedicated ICs.
There is also an effect that quick short-circuit energization control with little time delay can be performed. According to a twenty-ninth aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the first aspect, after the short-circuit energization of the switching element of the forced energization circuit, the switching element is re-engaged for a time shorter than the energization time of the short-circuit energization. It is characterized by comprising a reactor silencing energizing means for performing an ON operation and short-circuit energizing.

With this configuration, it is possible to suppress the electromagnetic noise of the reactor that is generated when the short circuit is conducted.

According to a thirtieth aspect of the present invention, in the control device for a motor for a refrigeration cycle drive device according to the second aspect,
The present invention is characterized in that hydrofluorocarbon is used as a refrigerant used in a refrigeration cycle.

With such a configuration, the leakage current of the air conditioner using the HFC refrigerant can be suppressed, so that the reliability and safety can be improved.

[0045]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, the present invention will be described in detail based on a preferred embodiment. FIG. 1 shows an overall configuration of an embodiment of a control device for a motor for a refrigeration cycle drive device of the present invention. FIG. 3 is a circuit diagram partially shown by blocks. FIG. 1 shows a control device of an air conditioner as a control device of a motor for a refrigeration cycle drive device. This air conditioner includes an indoor unit and an outdoor unit, and has a configuration in which the indoor unit is connected to an AC power supply 1. ing. Among these, in the indoor unit, the operating power is supplied from the AC power supply 1 to the indoor control unit 3 containing the microcomputer via the noise filter 2. The indoor control unit 3 includes a receiving unit 5 that receives a command from the remote control device 4, a temperature sensor 6 that detects an indoor temperature, a display 7 that displays an operating state, and an indoor room that circulates wind through an indoor heat exchanger (not shown). A fan 8 and a louver 9 for changing the direction of blown air are connected.

On the other hand, in the outdoor unit, the compressor drive motor 1 is supplied from the AC power supply 1 via the noise filter 11.
9 and the outdoor control unit 30 are supplied with operating power (supply lines for the outdoor control unit 30 are omitted for simplification of the drawing). In this case, the reactor L is connected to one power supply path on the load side of the noise filter 11, and the current transformer 12 is connected to the other power supply path. Current transformer 1
2 is connected to an AC input current detector 13 for detecting an AC input current based on the output voltage. Further, a zero cross detector 14 for detecting a zero cross point of the AC voltage is connected between the power supply side of the reactor L and the load side of the current transformer 12. Further, a forced power supply circuit 15 is connected between the AC power supply line on the load side of the reactor L and the AC power supply line on the load side of the current transformer 12. The forcible circuit 15 includes a full-wave rectifier circuit in which diodes D3 to D6 are bridge-connected, and its AC input terminal is connected between the AC power supply lines via a fuse F.

A base drive power supply DS is connected in parallel with the zero cross detector 14. The base stripe power supply DS rectifies and smoothes an AC power supply voltage and applies a DC voltage to the light receiving element of the photocoupler PC.
The transistor Q is connected between the DC output terminals of the full-wave rectifier circuit constituting the forced energizing circuit 15, one end of the base drive power supply DS is connected to one end of the light receiving element of the photocoupler PC, and the other end of the light receiving element is connected to the other end. The other end of the base drive power supply DS is connected to the base of the transistor Q, and the emitter of the transistor Q is connected to the other end. The light emitting element of the photocoupler PC is connected to the outdoor control unit 30. These base drive power supply DS and photo coupler PC
And a conduction control circuit 16 for controlling the forced conduction circuit 15 by the transistor Q.

Further, a parallel connection circuit of a series connection circuit of the diodes DH and DL and a series connection circuit of the capacitors CH and CL is provided, and an AC power supply line on the load side of the reactor L is connected to an interconnection point of the diodes DH and DL. And a voltage doubler rectifier circuit 17 is provided in which an AC power supply line on the load side of the current transformer 12 is connected to an interconnection point between the capacitors CH and CL. Note that a diode D1 for preventing reverse charging is connected to the capacitor CH in parallel, and a diode D2 for preventing reverse charging is connected to the capacitor CL in parallel. A smoothing capacitor CD is connected between both ends of the voltage doubler rectifier circuit 17, that is, between the DC voltage output terminals. A well-known converter device is constituted by the voltage doubler rectifier circuit 17 and the smoothing capacitor CD. ing.

In this converter device, the DC voltage is controlled by turning on and off the switching element group.
An inverter main circuit 18 which is converted into a WM (pulse width modulation) voltage and added to a compressor drive motor 19 is connected.
The inverter main circuit 18 and an inverter control circuit, which will be described later, included in the outdoor control unit 30 constitute a well-known inverter device. In this case, a DC voltage detector 21 for detecting a DC voltage output from the converter device and a rotor position detector 22 for detecting a rotor position of the compressor drive motor 19 are provided. It is connected. The outdoor control unit 30 includes a four-way valve 23 that changes the refrigerant circulation direction according to each of the cooling and heating operation modes;
A temperature sensor 24 for detecting the temperature of the outdoor heat exchanger and an outdoor fan 25 for sending air to an outdoor heat exchanger (not shown) are connected. The outdoor control unit 30 also includes a microcomputer, and is configured to mutually transmit and receive control information to and from the indoor control unit 3.

FIG. 2 is a block diagram showing a detailed configuration of the indoor control unit 3 and the outdoor control unit 30. The control system of the indoor fan 8 and the louver 9 in the indoor unit, the four-way valve 23 and the outdoor fan 25 in the outdoor unit are shown. Since the control system is well known, its illustration is omitted, and the energization control circuit 1 which is deeply related to the present invention.
6 shows an energization control system for the inverter 6 and a PWM modulation system for the inverter main circuit 18.

In FIG. 3, the indoor control unit 3 includes a communication control unit 41 and a power supply control pattern setting unit 42.
On the other hand, the outdoor control unit 30 includes a communication control unit 31, a rotation speed command unit 32, a rotation speed deviation detection unit 33, a duty ratio command unit 34, an inverter control circuit 35, a data memory 36, a conduction mode switching unit 37, and a conduction state determination unit. 38. Among them, the communication control unit 31 of the outdoor control unit 30 mutually sends control information to the communication control unit 41 of the indoor control unit 3,
The rotation speed command unit 32 is a communication control unit 3
The number of rotations command is determined from the received signal of No. 1. Then, the determined rotational speed command is transmitted to the rotational speed deviation detecting means 33.
And duty ratio command means 34.

The rotational speed deviation detecting means 33 calculates the actual rotational speed from the rotor position signal of the compressor drive motor 19 detected by the rotor position detector 22, and further calculates the command rotational speed of the rotational speed command unit 32. And the difference signal is added to the duty ratio command means 34. The duty ratio command means 34 supplies a PWM signal to an inverter control circuit 35 with reference to a table or the like of a data memory 36 described later when a rotation speed command from the rotation speed command unit 32 is given, and a rotation speed deviation detection means 33 This is to correct the duty ratio of the PWM signal so as to correct the rotational speed deviation.

The data memory 36 sets the threshold value for switching the energization mode, the set current value I ₁ of the AC input current and the allowable maximum value as the “AC input current set value” SA, and sets the DC voltage priority energization mode for the forced energization circuit 15. The relationship between the short-circuit conduction time and the duty ratio at the time is referred to as “short-circuit conduction time / duty ratio: table” TA, and the relationship between the short-circuit conduction time and the duty ratio in the high power factor priority conduction mode is “short circuit conduction time / duty ratio”. : Table “TB”, the relation between the command rotation speed for the compressor drive motor 19 and the PWM duty ratio for the inverter main circuit 18 “PWM duty ratio / command rotation speed: table” TR, and the energization mode of the short-circuiting circuit 15 The value for correcting the detection value of the AC input current detector 13 due to the difference is referred to as “AC input current correction value” CA. Te, and stores each or correcting the conduction time by the power source frequency, the correction values or corrected energization interval or energizing time at the time of switching of energization mode as "converter switching time correction table" TS.

The energization mode switching means 37 includes a communication control unit 3
1, based on the output signal of the zero-crossing detector 14, the current detection value of the AC input current detector 13, the presence or absence of overvoltage detection by the overvoltage detector 21, and the data stored in the data memory 36 in accordance with the energization control pattern received via A short-circuit energization signal is generated and given to the energization control circuit 16. Further, the energization state determination means 38 determines the short-circuit energization circuit 1 according to the current detection value of the AC input current detector 13 and the duty ratio command output from the duty ratio command means 34.
5 determines whether or not 5 is operating normally, and transmits the determination signal to the indoor control unit 3 in addition to the communication control unit 31. The current information of the AC input current detector 13 is as follows.
Although not shown, it is provided to the energization control pattern setting means 42 via the communication control unit 31 of the outdoor control unit 30 and the communication control unit 41 of the indoor control unit 3.

Regarding the operation of the present embodiment configured as described above, first, a general control operation of the air conditioner will be described, and then, a short-circuit energizing operation will be described with reference to FIGS. . First, the AC voltage of the AC power supply 1 is supplied to the indoor control unit 3 via the noise filter 2, and is supplied to the voltage doubler rectifier circuit 17 and the outdoor control unit 30 via the noise filter 11. The voltage doubler rectifier circuit 17 charges the capacitor CH through the diode DH in the positive half cycle of the AC power supply voltage, and charges the capacitor CL through the diode DL in the negative half cycle of the AC power supply voltage. Therefore, the sum of the voltage of the capacitor CH and the voltage of the capacitor CL is applied to the smoothing capacitor CD, and a DC voltage twice as large as the AC power supply voltage is generated across the smoothing capacitor CD. Supplied to Note that diodes D1 and D2
Has a function of preventing the capacitors CH and CL from being charged in the reverse direction at the beginning of the operation start.

In this state, it is assumed that commands such as operation start, cooling and heating operation modes, indoor set temperature, indoor fan wind speed, and wind direction are applied to the receiving unit 5 from the remote controller 4. In response to this, the indoor control unit 3 displays the operating state and the like on the display 7.
And the drive control of the indoor fan 8 and the louver 9 is executed, and the number of rotations for driving the compressor drive motor 19 is calculated according to the deviation between the set temperature and the room temperature. At the same time, it transmits to the outdoor control unit 30.

The outdoor control unit 30 sets the four-way valve 23 in an excited state or a non-excited state according to the operation mode (cooling / heating) so that the actual rotation speed detected by the rotor position detector 22 matches the rotation speed command. Then, the switching element group of the inverter main circuit 18 is turned on and off. The outdoor control unit 30 drives the outdoor fan 25 and, in the heating operation mode, according to the temperature detected by the temperature sensor 24,
3 to perform a defrosting operation and the like.

Next, the short-circuit energizing operation will be described. When charging the capacitors CH and CL, when the instantaneous value of the power supply voltage exceeds the voltage across the capacitor, the reactor L
The current flows through. In this case, the zero-cross detector 1
4, the zero cross point of the AC voltage is detected, and the energization mode switching means 37 supplies a signal to the photocoupler PH for a predetermined time starting from the zero cross point or a point when a certain delay time has elapsed from the zero cross point, to turn on the transistor Q. Then, regardless of the charging voltage of the capacitors CH and CL, the reactor L and the AC current are short-circuited through the forced energizing circuit 15 and the current flows. The operation of forcing the current from the AC power supply to the reactor L in this manner is called short-circuit energization. Then, when the short-circuit energization is stopped, the current flowing in the reactor flows toward the capacitors CH and CL. Therefore, the output of the converter device, that is, the DC voltage is changed to P
The power supply power factor can be improved by maintaining it in a range suitable for WM control or changing the current waveform. Further, it is possible to operate without performing the short-circuit energizing operation, and when the duty ratio of the PWM control reaches 100% in order to maintain the commanded rotational speed, the DC voltage is increased by the short-circuit energized to increase the rotational speed. Control to compensate for the shortage can also be performed.

Hereinafter, a mode in which the short-circuit energizing operation is not performed at all is referred to as a non-short-circuit energizing mode M _0, and energization that maintains the DC voltage at a predetermined value or less while maintaining the power supply power factor at about 92% by the short-circuit energizing operation. Set the mode to DC voltage priority conduction mode M
_1, rotation short energization operation high power factor priority energization mode for holding the power factor to about 98% by energization mode M _2, the short-circuit current operation, the energization mode to maintain the command rotational speed of the DC voltage adjuster controlled to called number priority energization mode M _3, the DC voltage priority energization mode M _1, high power factor priority energization mode M
_2, collectively referred to as short-circuit current rotational speed priority energization mode M _3. To adjust the power factor to 92% or 98%,
It can be adjusted by changing the length of the short-circuit energizing time.

This embodiment determines whether the AC input current exceeds a predetermined value set in a low range of the compressor rotation speed, whether the duty ratio has reached a preset duty ratio (100%), A plurality of control patterns for changing the energization mode depending on whether or not the input current has reached the maximum value of the allowable range are prepared, and the control patterns are automatically set so as not to increase the leak current, or manually set by the remote controller 4. Or something to do. Therefore, a representative control pattern is shown in FIG. 3 for easy understanding. In the figure, the control pattern is such that the AC input current is the set current value I
Until it reaches the ₁ without shorting energized in a non-short-circuit current mode M _0, the AC input current shows a case of operating at a direct current voltage of priority energization mode M ₁ at all ranges greater than I _1. Control patterns are not short-circuited current in the non-short-circuit current mode M ₀ to AC input current reaches I _1, the AC input current exceeds the I ₁ to the duty ratio of the PWM signal reaches the set duty ratio of 100% DC voltage priority conduction mode M ₁
In driving, shows a case for short-circuiting current in the rotational speed priority energization mode M ₃ when the actual speed is lower than the command rotation speed of the compressor drive motor 19 despite the duty ratio of the PWM signal becomes 100% ing. Again, the rotational speed priority energization mode M ₃ are carried out assuming that the AC input current I ₃ when the duty ratio of the PWM signal is 100% less than the allowable maximum current. Control patterns are not short-circuited current in the non-short-circuit current mode M ₀ to the duty ratio of the PWM signal reaches 100%, the actual rotational speed of the compressor drive motor 19 a duty ratio of the PWM signal despite 100% There is an example of shorting current at a rotation speed priority energization mode M ₃ is lower than the command rotation speed. Incidentally, the rotational speed priority energization mode M ₃ duty ratio 70% when the duty ratio of the PWM signal is 100% set duty ratio to 10
The time may reach the range of 0%. In the case where the AC input current I ₂ is an allowable maximum current in a general household, the operation is performed on the assumption that the AC input current I ₂ is smaller than 20 A. Control patterns are not short-circuited current in the non-short-circuit current mode M ₀ to AC input current reaches I _1, a case where AC input current is operated at a high power factor priority energization mode M ₂ in all ranges greater than I ₁ Is shown.
Control pattern shows the case of operating at irrespective DC voltage priority energization mode M ₁ of the AC input current.

The energization control pattern setting means 42 constituting the indoor control unit 3 shown in FIG. 2 is provided with the model code of the air conditioner stored in the storage unit connected to the indoor control unit 3 or the remote control device 4. A set control pattern signal in which one of the control patterns for short-circuit energization,. When the control pattern of short-circuit energization is not set by the model code, the control pattern of forced energization is automatically set based on the cooling and heating operation modes and the current information detected by the AC input current detector 13.

[0062] Incidentally, in the air conditioner having a forced energizing circuit employs a control pattern operating at irrespective DC voltage priority energization mode M ₁ of the AC input current. That is, FIG. 4A shows the waveform diagrams of the voltage and current, and FIG.
As shown in each of FIG.
When operating in the non-short-circuit energizing mode M ₀ , an AC current I ₁₁ having a phase delayed with respect to the AC voltage V flows to lower the power factor, whereas in the DC voltage priority energizing mode M ₁ the AC voltage is reduced. only reactor L from the zero cross point time T there is ensured a waveform improved by supplying a short-circuit AC current I ₁₂ by energization, it is possible to achieve power factor improvement. In this case, so as to maintain a suitable voltage to a DC voltage priority energization mode M ₁ In PWM control, by changing the short energization time T in response to the AC input current.

However, when the short-circuit energization control is performed in a range where the AC input current is small, for example, in the section of α until the current I ₁ shown in FIG. 3 is reached, the DC voltage rises because the load of the motor is small. Tends to be too much. Therefore, it is difficult to control the energization time to be short in order to suppress the voltage rise. In some cases, as shown in FIG.
It may become two mountains and current I ₂₂ flowing in the current I ₂₁ and the voltage doubler rectifier circuit 17 due to a short-circuit current to a half-cycle period is shifted in the time axis direction. Such a state in which the current flows while being divided into two peaks leads to a deterioration in the power factor. In order to secure a predetermined power factor even in the current section α shown in FIG. 3, a waveform diagram of a voltage and a current is shown in FIG. 6A, and a forced energizing pulse FP is shown in FIG. 6B. As described above, by forcibly energizing for the time T ₁ from the point in time delayed from the zero cross point of the AC voltage by the time T _{0,
It is} necessary to shape the current waveform as shown in FIG.

Therefore, in the present embodiment, any of the control patterns to automatically determined by the energization control pattern setting means 42 is always in the non-short-circuit energization mode M _{0 in} the range of the current section α equal to or less than the set power supply value I ₁ shown in FIG. To prevent DC voltage rise. Specifically, during a heating operation with a relatively large air-conditioning load, the duty ratio of the PWM signal exceeds the current I ₁ stored as the “AC input current setting value” SA in order to increase the power supply power factor and suppress the current value to be low. There was operated at a direct current voltage priority energization mode M ₂ in the range to reach 100% setting a duty ratio to set the control pattern for operating at a rotational speed priority energization mode M ₃ and the duty ratio is equal to or greater than the set duty ratio, during a relatively small cooling operation of the air conditioning load to spread the duty ratio, sets the control pattern to be operated at a DC voltage priority energization mode M ₁ in a range exceeding current I _1.

The energization control pattern setting means 42
Pattern or pattern rotation speed priority conduction mode M ₃
During operation at, the AC input current is "AC input current set value" S
When the allowable maximum value stored as A is reached, a function is provided for changing the setting of the short-circuit energizing time so that the current value falls within the allowable range.

Now, the above-described energization control pattern signal is:
It is transmitted to the outdoor control unit 30 as a serial signal together with a cooling / heating operation mode command and a rotation speed command of the compressor drive motor. In the outdoor control unit 30, the communication control unit 31 receives this signal, converts the signal into a parallel signal, and adds it to the rotation speed command unit 32 and the conduction mode switching unit 37. The rotation speed command section 32 extracts a rotation speed command from this signal and adds it to the rotation speed deviation detection means 33 and the duty ratio command means 34.

The duty ratio instructing means 34 operates as a “PWM duty ratio / instruction rotational speed: table” in the data memory 36.
Referring to TR, the duty ratio P corresponding to the rotation speed command
A WM signal is generated and applied to the inverter control circuit 35.
The rotational speed deviation detecting means 33 calculates the actual rotational speed from the rotor position signal detected by the rotor position detector 22, compares it with a rotational speed command, and adds the deviation signal to the duty ratio commanding means. Further, the duty ratio command means 34 corrects the duty ratio of the PWM signal according to the rotation deviation signal output from the rotation number deviation detection means 33 so that the rotation number deviation becomes zero. The inverter control circuit 35 controls on / off of a switching element group constituting the inverter main circuit 18 according to the PWM signal.

On the other hand, the energization mode switching means 37 receives a signal from the communication control unit 31 and determines a set control pattern. In this case, if the control pattern of FIG. 3 in which the control pattern comprises a DC voltage priority energization mode M _1,
With reference to the “short circuit energizing time / duty ratio: table” TA, a short circuit energizing signal is generated and added to the energization control circuit 16. At this time, the short-circuit energization time corresponding to the duty ratio output from the duty ratio command means is referred to as “short-circuit energization time /
Duty ratio: Reads from the table “TA” and outputs a short-circuit energization signal based on the zero-cross point detected by the zero-cross detector 14. When the AC input current is smaller than the set current value I ₁ , the operation is performed in the non-short-circuit conduction mode M ₀ , and when the AC input current exceeds I ₁ , the operation is performed in the DC voltage priority operation mode M ₁ . In the case of control pattern, short energization time / duty ratio: refers to the table TA, the AC input is a current I ₁ is smaller than the range is operated in the non-short-circuit current mode, PWM exceed AC input current I ₁
The duty ratio of the signal is operated at a direct current voltage priority energization mode M ₁ to reach 100%, the duty ratio is 100
% In the state driven at the revolving speed priority energization mode M ₃ with reference to the "converter switching time correction value table" TS. Incidentally, when an overvoltage is detected by overvoltage detector 21 energization mode switching means 37 during operation of the DC voltage priority energization mode M _1, with reference to the "converter switching time correction value table" TS, a short conduction time Make corrections to make them shorter.

Next, the energization mode switching means 37 determines the energization control pattern from the output signal of the communication control section 31. As a result, if it is a control pattern, the duty ratio of the PWM signal changes to the set duty ratio. operating at non-short-circuit current mode until it reaches and is operated at a rotational speed priority energization mode M ₁ with reference to the table TS exceeds set duty ratio.

Next, energization mode switching means 37, a result of determining a control pattern of energization from the output signal of the communication control unit 31, if the control pattern of FIG. 3 comprising a high power factor priority energization mode M _2, With reference to the “short-circuit energizing time / duty ratio: table” TB, a short-circuit energizing signal is generated and added to the energization control circuit 16. At this time, the AC input current detector 1
The short-circuit energizing time corresponding to the detection value of No. 3 is expressed as “short-circuit energizing time /
The duty ratio is read from the table “TB”, and a short-circuit energization signal is output based on the zero-cross point detected by the zero-cross detector 14. Thus, the AC input current is I ₁ is smaller than the range is operated in the non-short-circuit current mode M _0, the AC input current is in a range exceeding I ₁ is operated at a high power factor priority energization mode M _2.

As described above, all of the control patterns 1 to 4 operate in the non-short-circuit conduction mode in which short-circuit conduction is prohibited in a range where the AC input current is small, so that an excessive rise in the DC voltage can be suppressed. Since it is not necessary to increase the number of times of chopping, the occurrence of leakage current can be reduced. Therefore, in the air conditioner or the refrigeration apparatus using the HFC (hydrofluorocarbon) refrigeration in which the leak current is likely to increase from the compressor casing, the air conditioner or the refrigeration apparatus using the HFC refrigerant by adopting the control of the present embodiment. Reliability and safety can be improved.

As a specific component of the HFC refrigerant, R32
R410A in which (difluoromethane) and R125 (pentafluoroethane) are mixed at approximately 50% by weight can be used.

By the way, when shifting from the non-short-circuit energizing mode M ₀ to the high power factor priority energizing mode M ₂ during the operation in the control pattern, or during the operation in the control pattern or during the non-short-circuit energizing mode M ₀ , when going to the voltage priority energization mode M _1, AC input current waveform is changed. This change in the current waveform appears as an error in the current detection value.
A correction value for correcting this error is stored in the data memory 36 as an “AC input current correction value” CA. Therefore, when the energization mode is switched, the energization mode switching means 37 corrects the current detection value of the AC input current detector 13 and stores the corresponding short-circuit energization time in the tables TA, T.
Read from B to generate a short-circuit energization signal.

[0074] The control pattern ,, non short energization mode M ₀ DC voltage priority energization mode M ₁ or from the when a transition to the high power factor priority energization mode M _2, since the DC voltage increases rapidly, the compressor The rotation state of the drive motor 19 changes, and a "beating sound" is generated. The energization mode switching means 37 also has a function of preventing this "beat noise". As a method for preventing the "beat tones", as shown in FIG. 7, T ₁ the width of the short-circuit current pulse FP output for each zero-cross point of the AC voltage _{V, T 1, T 2 (} >
T ₁ ), T ₂ , T ₃ (> T ₂ ), T ₃ ,... May be sequentially expanded to return to the value of the “short circuit energizing time / duty ratio: table” TB. , FIG.
As shown in (1), the output interval of the short-circuit energization pulse FP immediately after the energization mode is switched may be widened, and thereafter, the energization interval may be gradually narrowed to generate an AC voltage at each zero-cross point.

Also, as in the control pattern,
DC from the non-short-circuit current mode M ₀ voltage priority energization mode M ₁
Or shifting to high power factor priority energization mode M _2, electromagnetic noise tends to occur from the reactor. As a method for preventing this, as shown in FIG. 10, a short-circuit energizing pulse FS is used for a short time a plurality of times after the short-circuit energizing pulse FP, so that a silencing effect can be obtained.

Incidentally, it is necessary to confirm the operating state of the above-described forced energizing circuit 15 to determine whether it has been normally operated. Therefore, in the present embodiment, the energization state determination unit 38 is provided. In this case, the DC voltage priority energizing mode M ₁ ,
High power factor priority energization mode M ₂ and the rotational speed priority energization mode M
AC input current and the duty ratio at ₃ is large compared to the AC input current and the duty ratio of the non-short-circuit current mode M _0. Therefore, as shown in FIG. 9, to set the threshold I _r to the AC input current I, also set the threshold D _r with respect to the duty ratio, the AC input current I in is I> I _r ,
When the duty ratio D becomes D> _Dr , it is determined that the forced energization circuit has been operated normally, and the information is returned to the indoor control unit 3 as control information.
Is displayed. In this case, the threshold value I _r,
Since _Dr changes depending on the rating and the like, an optimum value is selected by simulation or experiment. Thus, if the content of the normal operation of the forced energizing circuit is not displayed on the display 7 of the indoor control unit 3 in spite of the setting of the short-circuit energizing mode, it is determined that the forced energizing circuit is abnormal. it can. Even when it is determined that there is an abnormality, it is possible to continue the non-short circuit energizing mode by prohibiting the short circuit energizing of the forced energizing circuit.

As a simple method of determining whether or not the operation has been performed in the short-circuit conduction mode, for example, whether or not the increase in the duty ratio exceeds a predetermined value, or whether or not the increase in the AC input current exceeds the predetermined value The determination may be made based on whether or not the number has been exceeded.

Incidentally, the forced energizing circuit 15 shown in FIG.
Connects the diodes D3 to D6 in a bridge, connects its AC terminal to the AC power supply line, and connects the transistor Q between the DC terminals.
Is connected. Therefore, when the transistor Q is short-circuited, the function of the converter device itself is lost,
Driving of the compressor drive motor 19 becomes impossible. In this embodiment, since the fuse F is connected to the forced energizing path, if the transistor Q is short-circuited, the fuse F is immediately blown and the forced energizing circuit 15 is disconnected. Therefore, even if function is lost in the forced energizing circuit 15 can continue to drive the compressor drive motor 19 by a non-short-circuit current mode M _0.

In the above embodiment, the energization mode switching means outputs a forced energization pulse based on the data in the data memory. However, the storage means and the energization mode switching means are provided in a custom LSI or IC dedicated to short-circuit energization and short-circuit energization is performed. Pulses can be output and controlled. In this case, time delay due to software processing is eliminated, and highly accurate processing can be performed.

In the above embodiment, the data memory is used. However, these functions are performed by a microcomputer based on the AC input current, the compressor rotation speed, or the duty ratio of the PWM signal. ), A zero-cross signal from the zero-cross detector is input to the microcomputer, and a short-circuit energizing pulse is generated using a timer in the microcomputer. In this case, a dedicated IC is used. There is an advantage that it is not necessary to use. In this case, it is not necessary to use a DC voltage detector for determining the load on the compressor.

In the above embodiment, the AC input current is I
DC voltage priority energization mode M ₁ from the non-short-circuit current mode M ₀ under the condition that it has reached ₁ has been shifted to the high power factor priority energization mode M _2, the compressor drive motor is operated in this alternative, the AC input current Exceeds the predetermined value and the logical product condition that the duty ratio of the PWM voltage exceeds the predetermined value is satisfied, the non-short-circuit energizing mode M ₀ to the DC voltage priority energizing mode M ₁ and the high power factor priority energizing mode M ₂ In this case, reliable operation control not affected by noise can be performed.

[0082]

As is apparent from the above description, according to the present invention, a converter for converting an AC voltage supplied from an AC power supply to a DC voltage, and a DC voltage converted by the converter to a PWM voltage. An inverter device for converting and supplying a compressor drive motor forming a refrigeration cycle, a reactor connected in series to a power supply side of the converter device, and a switching element for forcibly short-circuiting the reactor and the AC power supply. Since the power supply circuit includes a forced energizing circuit and a short-circuit energizing mode for controlling a power supply power factor or a DC voltage by short-circuit energizing the forced circuit and a non-short-circuit energizing mode for prohibiting short-circuit energizing, When the AC input current is equal to or less than a predetermined value, the motor is operated in the non-short-circuit conduction mode, so that the leakage current of the motor due to the DC rise is increased. Increase, there is a prevent effect deterioration of the power factor of the power supply.

[Brief description of the drawings]

FIG. 1 is a circuit diagram partially showing the overall configuration of an embodiment of the present invention by blocks.

FIG. 2 is a block diagram showing a detailed configuration of main elements of the embodiment shown in FIG.

FIG. 3 is a gland diagram showing a relationship between an AC input current and a DC voltage for explaining the operation of the embodiment shown in FIG. 1;

FIG. 4 is a waveform chart showing waveforms of a voltage, a current, and a short-circuit energizing pulse for explaining the operation of the embodiment shown in FIG. 1;

FIG. 5 is a waveform chart showing voltage and current waveforms for explaining the operation of the embodiment shown in FIG. 1;

FIG. 6 is a waveform chart showing voltage and current waveforms for explaining the operation of the embodiment shown in FIG. 1;

FIG. 7 is a waveform chart showing waveforms of a voltage and a short-circuit energizing pulse for explaining the operation of the embodiment shown in FIG. 1;

FIG. 8 is a waveform chart showing waveforms of a voltage and a forced energizing pulse for explaining the operation of the embodiment shown in FIG. 1;

FIG. 9 is a diagram showing an operation range of a forced energization circuit for explaining the operation of the embodiment shown in FIG. 1;

FIG. 10 is a waveform diagram showing an energizing pulse for suppressing the electromagnetic sound of the reactor.

[Explanation of symbols]

 3 Indoor Control Unit 13 AC Input Current Detector 14 Zero Cross Detector 15 Forced Current Circuit 16 Current Control Circuit 17 Voltage Doubler Rectifier Circuit 18 Inverter Main Circuit 19 Compressor Drive Motor 21 DC Voltage Detector 22 Rotor Position Detector 30 Outdoor Control Unit 33 rotation speed deviation detection means 34 duty ratio command means 35 inverter control circuit 36 data memory 37 conduction mode switching means 38 conduction state determination means 42 conduction control pattern setting means L reactor CD smoothing capacitor

Continued on the front page (51) Int.Cl. ⁶ Identification code FI H02M 7/217 H02M 7/217 (72) Inventor Yuji Kato 336 Tatehara, Fuji City, Shizuoka Prefecture Toshiba Fuji Plant, Inc. (72) Inventor Igarashi Yuiyuki 336 Tatehara, Fuji City, Shizuoka Prefecture Inside the Toshiba Fuji Plant, Ltd. Inside Toshiba Fuji Factory (72) Inventor Sohiro Kobayashi Inside 3-3-9, Shimbashi, Minato-ku, Tokyo Toshiba Abu E Co., Ltd.

Claims (30)

[Claims] 1. A converter device for converting an AC voltage supplied from an AC power supply to a DC voltage, and a DC voltage converted by the converter device to a PWM voltage to be supplied to a compressor drive motor forming a refrigeration cycle. An inverter device, a reactor connected in series to a power supply side of the converter device, a forced current circuit including a switching element for forcibly short-circuiting the reactor and the AC power source, and a short-circuit current of the forced circuit. A refrigeration cycle drive device comprising: a short-circuit conduction mode for controlling a power supply power factor or a DC voltage; and a conduction control pattern setting means for setting one of a non-short-circuit conduction mode for inhibiting the short-circuit conduction. Motor control device. 2. The control device for a motor for a refrigeration cycle drive device according to claim 1, wherein a non-short-circuit conduction mode is set when the AC input current is equal to or less than a predetermined current value. 3. The control device for an electric motor for a refrigeration cycle drive device according to claim 1, wherein when shifting from the non-short-circuit energizing mode to the short-circuit energizing mode, the short-circuit energizing time is gradually lengthened. 4. The control device for an electric motor for a refrigeration cycle drive device according to claim 1, wherein, when shifting from the short-circuit energization mode to the non-short-circuit energization mode, the short-circuit energization time is gradually shortened. 5. When a transition is made from the non-short-circuit energizing mode to the short-circuit energizing mode, the short-circuit energizing is started at intervals between a predetermined number of zero-cross points, and the interval between short-circuit energizing is gradually narrowed. 2. The control device for an electric motor for a refrigeration cycle drive device according to 1. 6. A converter device for converting an AC voltage supplied from an AC power supply to a DC voltage, and a DC voltage converted by the converter device to a PWM voltage to be supplied to a compressor drive motor forming a refrigeration cycle. An inverter device, a reactor connected in series to a power supply side of the converter device, a forced energizing circuit including a switching element for forcibly short-circuiting the reactor and an AC power supply, and an output from the converter device. A DC voltage priority energizing mode in which the DC voltage is suppressed to a predetermined voltage value or less by short-circuit energization of the forcible energizing circuit, and a rotational speed priority energizing mode for controlling the rotational speed of the compressor drive motor by short-circuit energizing the forcible energizing circuit, Energization control pattern setting means for setting any of the short-circuit energization modes for inhibiting the short-circuit energization, Controller of the refrigeration cycle drive electric motor, characterized in that. 7. A converter device for converting an AC voltage supplied from an AC power supply into a DC voltage, and a DC voltage converted by the converter device to a PWM voltage to be supplied to a compressor drive motor forming a refrigeration cycle. An inverter device, a reactor connected in series to a power supply side of the converter device, a forced energizing circuit including a switching element for forcibly short-circuiting the reactor and an AC power supply, and an output from the converter device. A DC voltage priority energization mode in which the DC voltage is suppressed to a predetermined value or less by short-circuit energization of the forced energization circuit, a rotation for controlling the rotation speed of the compressor drive motor by increasing or decreasing the DC voltage by short-circuit energization of the forced energization circuit; One of the number priority conduction mode and the non-short-circuit conduction mode in which these priority controls are not executed, depending on the AC input current A control device for a motor for a refrigeration cycle drive, comprising: an energization control pattern setting unit that sets any one of a plurality of energization modes or a plurality of control patterns for selectively switching between a plurality of energization modes. 8. A converter device for converting an AC voltage supplied from an AC power supply to a DC voltage, and a DC voltage converted by the converter device to a PWM voltage to be supplied to a compressor drive motor forming a refrigeration cycle. An inverter device, a reactor connected in series to a power supply side of the converter device, a forced energizing circuit including a switching element that forcibly short-circuits the reactor and an AC power supply, and a power factor of the converter device. A high power factor priority energizing mode in which the DC voltage output from the converter device is controlled to a predetermined value or less by short-circuiting the forced energizing circuit. A rotational speed priority energizing mode for controlling the rotational speed of the compressor drive motor by short-circuit energization of the forcible energizing circuit; Among the non-short-circuit energization modes in which these priority controls are not executed, energization control pattern setting for setting one of a plurality of control patterns for selectively switching a single energization mode or a plurality of energization modes according to the AC input current A control device for a motor for a refrigeration cycle drive device, comprising: 9. An AC input current detector for detecting an AC input current, a storage means for storing a forced energization time for an AC input current as table data for each of the energization modes, and detecting a zero-cross point of the AC voltage. A zero-crossing point detecting means, and a zero-crossing point of the AC voltage for the short-circuiting energizing time stored in the storage means corresponding to the detection value of the AC input current detector in accordance with the control pattern set by the energizing control pattern setting means. 9. An energization mode switching means for controlling ON / OFF of the switching element so as to energize the forcible energization circuit starting from a predetermined time after the zero crossing point as a starting point. Control device for electric motor for refrigeration cycle drive device. 10. The control pattern for selectively switching a plurality of energization modes is a non-short-circuit energization mode when the duty ratio of the PWM voltage is less than a preset duty ratio, and the duty ratio reaches the set duty ratio. The control device for a motor for a refrigeration cycle drive device according to any one of claims 4 to 6, further comprising a control pattern for shifting to a rotation speed priority energizing mode after the operation. 11. The control pattern for selectively switching a plurality of energization modes includes a non-short-circuit energization mode when an AC input current is equal to or less than a predetermined current value, and a DC voltage priority energization when the AC input current exceeds a predetermined current value. 7. The control pattern according to claim 4, further comprising a control pattern for shifting to a rotation speed priority energizing mode when the duty ratio of the PWM voltage reaches a preset duty ratio. Control device for electric motor for refrigeration cycle drive. 12. The control pattern for selectively switching a plurality of energization modes includes a non-short-circuit energization mode when an AC input current is equal to or less than a predetermined current value, and a DC voltage energization mode when the AC input current exceeds a predetermined current value. 7. The control device for an electric motor for a refrigeration cycle drive device according to claim 4, further comprising a control pattern for shifting to a mode. 13. The control pattern for selectively switching a plurality of energizing modes includes a non-short-circuit energizing mode when an AC input current is equal to or less than a predetermined current value, and a high power factor when the AC input current exceeds a predetermined current value. The control device for a motor for a refrigeration cycle drive device according to claim 6, further comprising a control pattern for shifting to an energization mode. 14. The control pattern for selectively switching a plurality of energizing modes includes a non-short-circuit energizing mode when an AC input current is equal to or less than a predetermined current value, and a DC voltage energizing mode when the AC input current exceeds a predetermined current value. A first control pattern for shifting to a mode, a non-short-circuit energizing mode when the AC input current is equal to or less than a predetermined current value, and shifting to a DC voltage priority energizing mode when the AC input current exceeds a predetermined current value; 5. A second control pattern for shifting to a rotation speed priority energizing mode when the duty ratio of the voltage reaches a preset duty ratio, comprising: Control device. 15. The control pattern for selectively switching between a plurality of energization modes includes a short-circuit energization mode when the AC input current is equal to or less than a predetermined current value, and a transition to a DC voltage priority energization mode when the AC input current exceeds a predetermined current value. When the AC input current exceeds a predetermined current value, the mode shifts to the DC voltage priority energizing mode, and when the duty ratio of the PWM voltage reaches the set duty ratio, the mode shifts to the rotation speed priority energizing mode. A second control pattern, a third control pattern for shifting to a non-short-circuit energizing mode when the duty ratio of the PWM voltage is equal to or less than a preset duty ratio, and for shifting to a rotation speed priority energizing mode when the duty ratio reaches the set duty ratio; The control device for an electric motor for a refrigeration cycle drive device according to claim 5, comprising: 16. The control pattern for selectively switching a plurality of energizing modes includes a non-short-circuit energizing mode when an AC input current is equal to or less than a predetermined current value, and a DC voltage energizing mode when the AC input current exceeds a predetermined current value. A first control pattern for shifting to a mode, a non-short-circuit energizing mode when the AC input current is equal to or less than a predetermined current value, and shifting to a DC voltage priority energizing mode when the AC input current exceeds a predetermined current value; A second control pattern for shifting to a rotation speed priority energizing mode when the duty ratio of the PWM voltage reaches a preset set duty ratio, and a non-short circuit energizing mode when the duty ratio of the PWM voltage is less than a preset duty ratio. A third control pattern for shifting to a rotation speed priority energizing mode when the duty ratio reaches a set duty ratio; The fourth control pattern which shifts to the high power factor energizing mode when the AC input current exceeds a predetermined current value in the specific short-circuit energizing mode in the following cases: Control device for electric motor for refrigeration cycle drive. 17. The control of the electric motor for a refrigeration cycle drive device according to claim 4, wherein the control pattern is switched depending on whether an operation mode of the air conditioner is a cooling operation or a heating operation. Air conditioner using the device. 18. The power supply control pattern setting means sets the first control pattern in a cooling operation mode and sets the second control pattern in a heating operation mode.
An air conditioner using the control device for an electric motor for a refrigeration cycle driving device according to item 1. 19. When the AC input current reaches a maximum allowable value in the control pattern of the energization control pattern setting means,
The control device for a motor for a refrigeration cycle drive device according to claim 6, further comprising a control pattern for changing a setting to the high power factor priority mode. 20. A power supply frequency detecting means for detecting a frequency of an AC power supply, wherein the storage means stores an energization time correction value corresponding to the power supply frequency, and wherein the energization mode switching means is detected by the power supply frequency detecting means. 8. The control device for a motor for a refrigeration cycle drive device according to claim 7, wherein when the power supply frequency is a frequency other than a predetermined power supply frequency, the short-circuit energization time is corrected by the energization time correction value. 21. A power supply frequency detecting means for detecting a frequency of an AC power supply, wherein the short-circuit energizing time corresponding to each of the detected first and second power supply frequencies is stored in the storage means. The control device for a motor for a refrigeration cycle drive device according to claim 20, wherein 22. The storage means stores an input current correction value for correcting a current detected by the AC input current detector by a difference in current waveform due to a difference in the conduction mode. 21. The control device for a motor for a refrigeration cycle drive device according to claim 20, wherein the detected current value is corrected by the input current correction value in a power supply mode other than the power supply mode. 23. A storage device comprising: a table in which a command duty ratio with respect to a command rotation speed is associated to generate a PWM voltage having a duty ratio corresponding to a command rotation speed of the compressor drive motor; The switching means is configured to operate in the DC voltage priority energizing mode when the compressor drive motor is operated, the AC input current exceeds a predetermined value, and a logical product condition that the duty ratio of the PWM voltage exceeds the predetermined value is satisfied. The control device for a motor for a refrigeration cycle drive device according to any one of claims 20 to 23, wherein the operation is performed in a power factor priority conduction mode. 24. The control of a motor for a refrigeration cycle drive device according to claim 1, wherein said forcible energizing circuit includes a fuse for shutting off the energizing circuit when a short-circuit energizing current exceeds a predetermined value. apparatus. 25. When the AC input current detected by the AC input current detector exceeds a predetermined value and the duty ratio of the PWM voltage exceeds a predetermined value, the operation state of the forced energization circuit is normal. The control device for a motor for a refrigeration cycle drive device according to claim 9, further comprising an energization state determination unit that determines that there is a current. 26. An increase in the current value is detected at the time of switching from the non-short-circuit energization mode to the DC voltage priority energization mode or the high power factor priority energization mode, and when the increase exceeds a predetermined value, The control device for a motor for a refrigeration cycle drive device according to claim 9, further comprising an energization state determination unit that determines that an operation state of the energization circuit is normal. 27. An increase in the duty ratio is detected at the time of switching from the non-short-circuit energization mode to the DC voltage priority energization mode or the high power factor priority energization mode, and when the increase exceeds a predetermined value, The control device for a motor for a refrigeration cycle drive device according to claim 9, further comprising an energization state determination unit that determines that an operation state of the energization circuit is normal. 28. The control device for an electric motor for a refrigeration cycle drive device according to claim 9, wherein said storage means and said energization mode switching means are constituted by dedicated ICs. 29. Reactor muffling energizing means for energizing the switching element again for a shorter time than the energizing time of the short-circuit energization and energizing the short-circuit after the short-circuit energization of the switching element of the forced energizing circuit. The control device for a motor for a refrigeration cycle drive device according to claim 1. 30. A refrigeration cycle using hydrofluorocarbon as a refrigerant.
The control device for an electric motor for a refrigeration cycle drive device according to Claim 1.