KR101475547B1 - Pwm cycloconverter device - Google Patents

Abstract

When a battery is used as an emergency DC power source in a PWM cycloconverter device used in an elevator or the like, when a large regenerative operation is generated from the motor, it is impossible to absorb all the regenerative power. When a large-capacity capacitor is used, a charging circuit is required.
The bidirectional switch module 7 is connected to the storage battery 8 in the backward state by connecting the storage battery 8 between one line on the input 3 and the regenerative capacitor 9 between the other one, PWM control is performed so that the motor 3 is connected and in the regenerative state, the bidirectional switch module 7 performs PWM control so that the regenerative capacitor 9 and the motor 3 are connected so that the regenerative power during the motor regenerative operation is regenerated And is absorbed by the condenser 9. Also, the regenerative capacitor 9 is charged by the battery 8. [

Description

PWM CYCLOCONVERTER DEVICE [0002]

The present invention is characterized in that each phase of the power source and each of the phases of the output side are directly connected by a bi-directional switch having a self-arc extinguishing capability, and a PWM To a cycloconverter device.

In the PWM cycloconverters used in the conventional elevator system and the like, there is a case where the connection is switched to the emergency power supply to continue operation even when an abnormality such as phase failure, power failure, power unbalance, etc. occurs in the power source .

An elevator system using a conventional PWM cycle converter device is connected to a three-phase AC power source, and is constituted by a drive device for an elevator, a motor, and an elevator machine, and is used as an emergency DC power source, such as an accumulator or a large capacity condenser, Power or three-phase AC power supply. Further, the elevator drive device includes a power converter, a power source abnormality detection circuit, an input power source phase detection circuit, an emergency power source phase detection circuit, a fixed phase information generation circuit, a phase detection circuit changeover setting device, a phase detection circuit changeover switch, Device, and the PWM cycle converter device is composed of an input filter, an input power level detection circuit, a control controller, a gate driver, and a bidirectional switch module.

According to the above-described configuration, the PWM cycler converter applied to the conventional elevator system is capable of performing emergency operation of the elevator by receiving power from various kinds of emergency power sources without changing the main circuit configuration at the time of failure of the three- (See, for example, Patent Document 1).

[Prior Art Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-294378 (page 5-6, Fig. 1)

In the conventional PWM cycloconverters, for example, the PWM cycloconverters can perform power regeneration operations. Therefore, when a large regenerative power is generated from the motor, for example, when the car is being lowered in the elevator, Is regenerated. However, when a battery is used as an emergency DC power source, the power is directly regenerated in the battery, so that the battery may not be able to absorb all the regenerative power.

When a large-capacity capacitor is used as the emergency DC power source, it is possible to absorb all the regenerative power by appropriately selecting the capacity of the capacitor, but a charging circuit for the capacitor is separately required.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a PWM cycle converter device using an emergency DC power supply capable of absorbing a large regenerative electric power during regenerative operation and requiring no special charging circuit do.

In order to achieve the above object, a PWM cycloconverting apparatus according to one aspect of the present invention is characterized in that the input side is connected to a three-wire power source, the output side is connected to a three-phase motor, An input power level detecting circuit for detecting a voltage value input from a three-wire power source and outputting an input voltage value; an input power level detecting circuit for detecting the phase of the three- A fixed phase information generating circuit for generating and outputting a plurality of fixed phase information and selecting any one of a plurality of fixed phase information according to a control switching signal; Phase switching circuit for switching the phase and the selected fixed phase information, And, the response to the emergency power source switching signal, by switching the PWM control method comprising a controller that generates and outputs the on-off signal of the bidirectional switch module.

In the PWM cycle converter device according to the one aspect, preferably, the control controller controls the three-phase AC input based on the input power source phase and the input voltage value, which is the output of the input power source level detection circuit, Off signal by the PWM method of the DC input three-phase AC output based on the input voltage value and either the first fixed phase information or the second fixed phase information by the PWM method of the three-phase AC output, Is generated.

The converter circuit according to one of the above aspects preferably further includes an output current detection circuit for detecting an output current of the bidirectional switch module, an output voltage command output from the control controller, and an output And a reverse regeneration discrimination circuit for generating a reverse regeneration discrimination signal on the basis of the detected current value, wherein the control switching signal is a reverse regeneration discrimination signal, and the fixed phase information generation circuit generates the reverse regeneration discrimination signal When the reverse state is determined, the first fixed phase information indicating one line of the three-wire power source is selected. When the reverse regeneration determination signal determines the regeneration state, 2 Select fixed phase information.

In the PWM cycle converter device according to one aspect, preferably, the three-wire type power source is a three-phase alternating-current power source, and both terminals of the battery are connected between one of the three lines, A three-wire type DC power source connected to both terminals of the regenerative capacitor, and a power source switching device for switching and outputting the three-phase AC power source and the three-wire type DC power source, wherein the control controller outputs an emergency power source switching signal to the power source switching device, 3-phase alternating current input 3-phase alternating current output that converts the 3-phase alternating current power and 3-wire type alternating current power according to the emergency power source switching signal and inputs the voltage of 3-phase alternating current power according to the emergency power source switching signal. Off signal is generated by the PWM method of the DC input three-phase AC output in which the on-off signal is generated by the PWM method or the voltage of the three-wire DC power supply is input, 1 fixed phase information is the phase information indicating a phase between the information indicating the storage battery between the positive terminal of the connection lines, the second stationary phase information, the amount of the terminal to which the connection line of the regenerative capacitor.

The PWM cycle converter according to one aspect preferably further includes a power supply abnormality detection circuit for detecting abnormality of the three-phase AC power supply and outputting a power supply abnormality detection signal, wherein the emergency power supply switching signal is a power supply abnormality detection Phase alternating current power source is switched by power source switching and when the power source abnormality detecting signal is outputted, the three-wire type direct current power source is switched by the power source switching device, When the detection signal is not output, the on-off signal is generated by the PWM method of the 3-phase AC input 3-phase AC output which receives the voltage of the 3-phase AC power supply. When the abnormality detection signal is output, Off signal by the PWM method of the DC input three-phase AC output with the input of the voltage of the on-off signal.

In the PWM cycle converter device according to one aspect, preferably, when charging the regenerative capacitor, the control controller connects three phases in the bidirectional switch module to each phase of the input 3 and one phase of the output In a bidirectional switch set consisting of three bidirectional switches, a bidirectional switch connected to the common connection point of the battery and the regenerative capacitor in the set of all bidirectional switches is turned off, and the other two input switches Lt; RTI ID = 0.0 > bi-directional < / RTI >

According to the PWM cycloconverter of the present invention, it is possible to use a battery as an emergency power source and a capacitor connected to another phase other than the phase to which the battery is connected, and also to use a bidirectional switch of the PWM cycle converter device, The motor is turned on so that the motor is connected, and the capacitor and the motor are connected to each other during the regenerative operation, so that the regenerative power during the motor regenerative operation is absorbed by the condenser and the condenser charging circuit can be made unnecessary.

1 is a system block diagram of an elevator drive device of the present invention,
Fig. 2 is a circuit connection diagram of the matrix converter in connection with the emergency power supply of the present invention,
3 shows a charging operation of the regenerative capacitor 9,
Fig. 4 is a diagram illustrating a bidirectional switch connection of the matrix converter during backward operation,
Fig. 5 shows a bidirectional switch connection of the matrix converter during regenerative operation.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 is a circuit diagram showing an embodiment of the present invention. The present invention relates to an output current detection circuit (16) and a retrograde regenerative discrimination circuit (16) which are applied to a system using an accumulator as an emergency power source by a drive system for driving a load generating a regenerative electric power such as an elevator 17, and the minus terminal of the regenerative capacitor is connected to the minus terminal of the accumulator, and the plus terminal is connected to the remaining phase of the input three phases, to which the accumulator is not connected.

1, the PWM cycle converter device 2 according to the present invention includes an input filter 6, an input power supply level detection circuit 10, a power supply error detection circuit 11, a control controller 13, A fixed phase information generation circuit 15, an output current detection circuit 16, a reverse regeneration determination circuit 17, a phase detection circuit changeover switch 18, and a bidirectional switch module 7. A power source switch 5, a three-phase alternating-current power supply 1, a regenerative capacitor 9 and a battery 8 connected in series are connected to the input side of the PWM cycle converter device 2. The motor 3 is connected to the output side of the PWM converter device 2 and the motor 3 drives the load device 4 that generates regenerative power such as an elevator machine.

The three-phase AC power supply 1 is connected to the bidirectional switch module 7 through the power switch 5 and the input filter 6. The bidirectional switch module 7 has nine bidirectional switches for connecting all the combinations of the three-phase voltages (R, S, T) of the three-phase AC power supply 1 inputted through the input filter 6 and the three- It is constituted by a switch. The output of the bidirectional switch module 7 is connected to each phase of the motor 3. Here, the input filter 6 is provided to attenuate the high-frequency component accompanying the switching of the bidirectional switch module and prevent it from flowing out to the three-phase AC power source 1. [ On the other hand, as an example of the bidirectional switch, two reverse-voltage-blocking IGBTs are connected in reverse parallel, two parallel-connected IGBTs and diodes are connected, and a collector connection or emitter connection of the IGBT is connected. , Or a series connection in which two series connection bodies in which an IGBT and a diode are connected in series in a forward direction are connected in inverse parallel connection. However, the present invention is not limited to these.

The input power level detecting circuit 10 detects the voltage value of each phase of the three-phase voltage input to the input filter 6. The input power phase detection circuit 14 detects two-phase voltages among three-phase voltages of the three-phase alternating-current power supply 1, inputs the detected voltage values to, for example, a PLL, And the phase of the phase voltage is obtained to obtain the input power phase. The fixed phase information generating circuit 15 is set in advance as to which phase of the input 3 phase and which phase the capacitor 8 as the emergency power source and the regenerative capacitor 9 respectively are connected between. The phase to be set will be described later. In the case where the capacitor 8 and the regenerative capacitor 9 are used as the power source, the phase regenerative capacitor (or the regenerative capacitor) to which the battery 8 is connected 9 to the phase detection circuit change-over switch 18. The phase detection circuit change- As an example of the operation of the power supply abnormality detecting circuit 11, the voltage of the three-phase AC power supply 1 is detected, the detected voltage value is converted into a two-phase voltage by three-phase two- And the detected voltage value is input to the PLL to obtain the frequency. When the amplitude of the voltage obtained in this manner is smaller than a preset voltage value, the phase difference is detected when the variation rate of the voltage and the amplitude of the voltage is equal to or larger than a preset value, and the difference between the obtained frequency and the preset rated frequency is set in advance Phase AC power supply 1 is detected by setting the power supply frequency to be higher than the power supply frequency by one or more than the power supply frequency. However, if it is detected that an abnormality in the power supply that interferes with the operation of the other PWM- It does not mean to do it. When the detected power source abnormality occurs in this manner, the power source abnormality detecting circuit 11 outputs a power source abnormality detecting signal to the power source switching device 5 and the phase detecting circuit changeover switch 18. [ On the other hand, it is also possible to select whether or not to use the emergency power source as a separate operating mechanism or the like, input an operation signal indicating the selection result into the PWM cycle converter device by the input / output device or the IO device, A signal indicating that an emergency power supply is required may be used instead of the power supply abnormality detection signal as an emergency power supply switching signal. In the above description, the value to be set in advance is set by a numerical value setting device (not shown), and the numerical value setting device is connected to the converter device 2 via a PWM circuit by a communication line or the like not shown, It becomes possible to use the set value in the PWM cycle converter device 2.

The control controller 13 receives setting values such as speed for the motor 3 set by a setting device and a setting operation mechanism (not shown) through an IO device or a communication device (not shown) The voltage command for the motor 3 is generated by a known vector control rule or V / F control rule. Based on the voltage value of each phase input from the input power supply level detection circuit 10 and the phase input from the input power supply phase detection circuit 14 or the fixed phase information generation circuit 15, the control controller 13 controls the PWM The gate signal for driving each bidirectional switch of the bidirectional switch module 7 is outputted from the voltage command to the gate driver 12 by the PWM method of the cycloconverter. Details of the operation of generating this gate signal will be described later. The gate driver 12 drives each bidirectional switch of the bidirectional switch module 7 based on the gate signal inputted from the control controller 13. [

The power switch 5 allows the three-phase output (R, S, T) from the three-phase AC power supply 1 to pass through the input filter 6 directly to the bidirectional switch module Phase alternating-current power supply voltage when the power supply abnormality detection signal is inputted, the voltage of the capacitor 8 and the regenerative capacitor 9 is switched through the input filter 6 Input to the bidirectional switch module.

When the power supply abnormality detection signal is not input, the phase detection circuit changeover switch 18 selects the phase information from the input power supply phase detection circuit 14 and outputs it to the control controller 13, The fixed phase information generating circuit 15 selects fixed phase information which is output from the fixed phase information generating circuit 15 and outputs the selected fixed phase information to the control controller 13. [

Based on the input voltage value output from the input power supply level detection circuit 10 and the input power supply phase output from the phase detection circuit changeover switch 18, the control controller 13 controls each bidirectional switch module 7 When the gate signal of the switch is on and off and the power supply abnormality detection signal is not inputted, the bidirectional switch module 7 performs the three-phase AC input three-phase AC output operation, And when the power supply abnormality detection signal is input, the bidirectional switch module (or the bidirectional switch module) is controlled according to the input voltage value output from the input power supply level detection circuit 10 and the fixed phase information output from the phase detection circuit changeover switch 18 7 generates the gate signal of the bidirectional switch module 7 so as to perform the DC input three-phase AC output operation. The generation of the gate signal of the bidirectional switch module 7 when the power supply abnormality detection signal is not inputted is performed by the PWM method of the various known three-phase AC input three-phase AC output PWM cycle converter.

In the PWM method of the three-phase AC input three-phase AC output, for example, the line-to-line voltage having the maximum amplitude at the phase from the detected input power source phase is selected from among three line voltages and the line- Selects a bidirectional switch, and determines an on-off signal for the bidirectional switch. The actual value of the selected line voltage is calculated by subtracting the two phase voltages from the input voltage value output from the input power supply level detection circuit 10 and the ratio of the voltage command at that time The ratio of the output of the output voltage is obtained in one PWM control cycle. The time (pulse width) in which the selected bidirectional switch is turned on in one PWM control cycle is determined by multiplying the time ratio by the time of one PWM control cycle. In another example, in order to improve the input current waveform, a PWM method in which a line-to-line voltage other than the maximum line-to-line voltage is output in one PWM control cycle, and a voltage having two or more different sizes is time- A PWM circuit that combines a PWM converter and an inverter in a direct current circuit is virtually provided, a PWM converter and an inverter on-off signal are generated from the input power phase and voltage command, and a PWM method in which a corresponding bidirectional switch of the PWM cycle converter is turned on and off , But the present invention may be the PWM method.

Next, the operation of the present invention in the case where the power supply abnormality detection signal is inputted and connected to the emergency power supply will be described. The SRU, SSU, STU, SRV, SSV, STV, SRW, SSW and STW are connected in parallel to the bidirectional switch module 7, Lt; / RTI > switches. The bidirectional switch module 7 supplies the backward electric power from the battery 8 to the motor 3 when performing the backward operation and supplies the backward electric power to the regenerative capacitor 9 when the regenerative operation is performed, 3).

When the emergency power source is connected as shown in Fig. 2, the regenerative capacitor 9 may not be charged before the start of the operation. At this time, the voltage of the regenerative capacitor 9 is 0 V, The voltages of S phase and T phase detected by the power supply level detecting circuit 10 are also 0V. In this case, a means for charging the regenerative capacitor 9 is required. When charging the regenerative capacitor 9, the control controller 13 outputs the gate signal to the gate driver 12 so that the bidirectional switch of the bidirectional switch module 7 is one of the following seven switching states.

(1) SRU: ON, SSU: OFF, STU: ON, SRV: OFF, SSV: OFF, STV: OFF,

(2) SRU: OFF, SSU: OFF, STU: OFF, SRV: ON, SSV: OFF, STV: ON,

(3) SRU: OFF, SSU: OFF, STU: OFF, SRV: OFF, SSV: OFF, STV: OFF,

(4) SRU: ON, SSU: OFF, STU: ON, SRV: ON, SSV: OFF, STV: ON,

(5) SRU: OFF, SSU: OFF, STU: OFF, SRV: ON, SSV: OFF, STV: ON,

(6) SRU: ON, SSU: OFF, STU: ON, SRV: OFF, SSV: OFF, STV: OFF,

(7) SRU: ON, SSU: OFF, STU: ON, SRV: ON, SSV: OFF, STV: ON,

These seven switching states equivalently produce the circuit shown in Fig. 3, which is a charging circuit in which a capacitor and a capacitor are connected in parallel and the capacitor 9 is charged with the polarity shown in Fig. By comparison with the connections of the nine bidirectional switches shown in Fig. 2, the circuit by the switches SR, SS and ST in Fig. 3 actually comprises three bidirectional switch sets SRU, SSU, STU), (SRV, SSV, STV), (SRW, SSW, STW). The seven switching states shown in the equivalent circuit shown in Fig. 3 open the switches on the input connected to the common connection point of the battery 8 and the capacitor 9 to all three sets of bidirectional switches, In the set of bi-directional switches, all of the two bi-directional switches that follow the inputs other than the input phase following the common connection point are closed. With these switching states, the voltage of the battery 8 is applied to the regenerative capacitor 9, and the regenerative capacitor 9 is charged with the polarity shown in Fig. It is preferable to determine whether the two bidirectional switches are closed in the several sets of bidirectional switches so that the charging current of the current rating or more does not flow to the bidirectional switches in consideration of the current rating of the bidirectional switches. On the other hand, in the switching states of (1) to (7), for example, a bidirectional switch set to be opened in both sets of switches (SRW, . One of the two switches other than the bidirectional switch connected to the common connection point of the capacitor 8 and the capacitor 9 among the bidirectional switches included in the bidirectional switch set may be closed. Either the SRV or the STV may be closed in the example of the bidirectional switch set SRV, SSV and STV of the switch 1 shown in Fig. This is because these switches do not generate a new closed circuit even if they are closed, and the charging circuit of the battery is not different from that caused by the switching state shown in (1).

Next, the case of using the emergency power source after the regenerative capacitor 9 is charged will be described. When the power supply abnormality detection signal is input, the phase detection circuit changeover switch 18 outputs the fixed phase information generation circuit 15 to the control controller 13. [ As an example of the fixed phase information, information indicating which one of the three input phases the accumulator 8 and the regenerative capacitor 9 is connected to is replaced with a phase. The capacitor 8 and the regenerative capacitor 9 are connected between any one of the R phase, the S phase and the T phase of the three-phase AC power source 1 by the power source switch 5. An example of the fixed phase information is a phase output from the input power source phase detection circuit 14 when the phase voltage of the R phase becomes a positive or negative maximum value in order to indicate between the R phase and the S phase. Similarly, in order to indicate between the S phase and the T phase, when the phase voltage of the S phase becomes the positive or negative maximum value, the phase outputted from the input voltage phase detection circuit 14 is set to be between the T phase and the R phase And the phase output from the input voltage detecting circuit when the phase voltage of the T phase becomes a positive or negative maximum value. 2, since the plus terminal of the battery 8 is connected to the R phase and the minus terminal is connected to the S phase, the fixed phase information for the battery 8 is input when the phase voltage of the R phase is a positive maximum value And output from the voltage phase detection circuit 14. Since the negative terminal of the regenerative capacitor 9 is connected to the S phase and the positive terminal thereof is connected to the T phase, the phase information for the regenerative capacitor 9 is the phase voltage of the S phase, The phase output from the input phase detection circuit 14 is set. As described above, the fixed phase information is a combination of the R phase and the S phase, the S phase and the T phase, the T phase and the R phase, of the above three input phases, Or may be an encoded signal that identifies the number of states.

The output current detection value obtained by detecting the output current of the converter in the PWM cycle by the output current detection circuit 16 and the output voltage command originally calculated by the control controller 13 are input to the reverse regeneration determination circuit 17, the reverse regeneration discrimination circuit 17 performs this. The retrograde regenerative discrimination circuit 17 outputs a regenerative discrimination signal to the control controller 13 and the fixed phase information generation circuit 15 based on the discrimination result.

The retrograde regenerative discrimination circuit 17 obtains the phase difference between the output voltage and the output current from the output phase voltage command and the output current detection value. In order to obtain the phase difference [phi], the retrograde regenerative discrimination circuit 17 compares the three-phase output phase voltage command and the three-phase output current detection value with the commonly known three-phase to two-phase (dq axis) The vector conversion circuit outputs the output voltage vector converted from the output phase voltage command and the output current vector converted from the output current detection value. Since the phase difference? Is an angle formed by these two vectors, the retrograde regenerative discrimination circuit 17 is provided with a phase difference calculation circuit for calculating the angle formed by these two vectors. As a specific example, the phase angle? Of the output voltage and the output current is defined below. Here, X represents a vector such as a voltage, a current, or the like, and either one of an output voltage vector and an output current vector may be established. X _d represents the d-axis component of the vector X, and X _q represents the q-axis component of the vector X.

Than the phase angle θ is the angle of vector X and the d-axis forming, phase difference φ of the phase Speaking each θi _out, θv _out that the angle θ obtained for the output current and output voltage, respectively, output voltage and output current of formula (1).

The phase difference calculation circuit calculates the phase difference? Between the output voltage and the output current according to equation (1). The reverse regeneration discriminating circuit 17 includes a phase difference judging section, and the phase difference judging section judges whether the converter is in the reverse operation mode or the regenerative operation mode in the PWM cycle by the following judgment method.

일 때

when

Backward driving

일 때

when

Regenerative operation

On the other hand, a separate operating mechanism or the like selects whether to use the accumulator 8 or the regenerative capacitor 9 as the emergency power source, and outputs an operation signal indicating the selection result to the input / output device or the I / And a selection signal of which one of the battery 8 and the regenerative capacitor 9 is to be used, such as using the power supply abnormality detection signal in place of the power supply abnormality detection signal obtained by performing a logical OR operation with the backward regeneration determination signal, , It may be used instead of the retrograde regenerative discrimination signal.

4 shows a connection diagram of the bidirectional switch of the bidirectional switch module 7 which is turned on and off by the gate drive signal outputted from the control controller 13 when it is judged that the operation is reverse operation by the backward regeneration discrimination signal. The bidirectional switch indicated by the solid line in the drawing is on and off, and the switch indicated by the dotted line is always off. The SRU is a bidirectional switch for connecting the positive side of the battery 8 and the U phase of the motor 3, and SRV and SRW are also bidirectional switches for connecting the V phase and the W phase of the motor 3, respectively. The SSU is a bidirectional switch for connecting the minus side of the battery 8 and the U phase of the motor 3, and SSV and SSW are bidirectional switches for connecting V phase and W phase of the motor 3, respectively. The motor 3 is connected only to the battery 8 and the motor 8 is also connected to the motor 8 based on the voltage of the battery 8, 3 is performed. The above-mentioned operation of the gate drive signal is performed by the PWM method of the three-phase alternating current input three-phase alternating current output PWM cycle converter when the power supply abnormality detection signal is not inputted as described above, Method is the same as the operation of the gate drive signal when the phase of the input voltage is the phase where the line-to-line voltage between the R-phase and the S-phase is maximum and the phase voltage of the R-phase is positive. When it is determined that the reverse regeneration discrimination signal is the reverse phase, the fixed phase information generating circuit 15 generates the fixed phase information for the above-described accumulator 8, in which the line-to-line voltage between the R phase and the S phase is the maximum, And outputs a phase (an example of the first fixed phase information) in which the phase voltage becomes a positive value to the phase detection circuit change-over switch 18. [ Therefore, the control controller 13 switches the PWM method to a PWM method (an example of a PWM method of DC input three-phase AC output) for selecting and outputting a line-to-line voltage having the maximum amplitude, Based on the voltage value of the battery 8 calculated by subtracting from the fixed phase information inputted from the phase detector circuit 15 through the phase detection circuit changeover switch 18 and the input voltage value outputted from the input power supply level detection circuit 10, , And generates an on-off signal of the bidirectional switch.

5 shows a connection diagram of the bidirectional switch of the bidirectional switch module 7 which is turned on and off by the gate drive signal outputted from the control controller 13 when it is judged that the regenerative operation is performed by the regenerating discrimination signal. The bi-directional switch indicated by the solid line is turned on and off similarly as in Fig. 4, and the switch indicated by the dotted line is always turned off. SRT is a bidirectional switch for connecting the positive side of the regenerative capacitor 9 and the U phase of the motor 3 and STV and STW are also bidirectional switches for connecting the V phase and the W phase of the motor 3, do. The SSU is a bidirectional switch for connecting the minus side of the regenerative capacitor 9 and the U phase of the motor 3 and the SSV and SSW are bidirectional switches for connecting the V phase and the W phase of the motor 3, . Only the six bidirectional switches are turned on and off by the gate drive signal outputted from the control controller 13 so that the motor 3 is connected to the regenerative capacitor 9 and the voltage of the regenerative capacitor 9 The PWM control of the voltage output to the motor 3 is performed. The above-mentioned operation of the gate drive signal is performed by the PWM method of the three-phase alternating current input three-phase alternating current output PWM cycle converter when the power supply abnormality detection signal is not inputted as described above, Method is the same as the operation of the gate drive signal when the phase of the input voltage is the phase where the line-to-line voltage between the S-phase and the T-phase is the maximum and the phase voltage of the S phase becomes the negative value. When it is determined that the regenerative power is generated by the regenerative discrimination signal, the fixed phase information generation circuit 15 generates the fixed phase information for the regenerative condenser 9 in the phase in which the phase voltage of the S phase becomes a negative value (E.g., fixed phase information) to the phase detection circuit changeover switch 18. Therefore, the control controller 13 selects the phase detection circuit changeover switch (phase change detection circuit) from the fixed phase information generation circuit 15 by the PWM method for selecting and outputting the line voltage having the maximum amplitude, Based on the voltage value of the regenerative capacitor 9 calculated by subtracting the fixed phase information inputted from the input power supply level detection circuit 10 and the input voltage value outputted from the input voltage level which is the output of the input power supply level detection circuit 10, Off signal of the bidirectional switch.

On the other hand, in the PWM method of DC input three-phase output, if a direct DC voltage input line is specified without interposing the phase information, a bidirectional switch for connecting the two phases and the output three phases corresponding to each other is selected , The ratio of the output voltage to the output voltage may be obtained based on the ratio of the voltage command to the DC voltage value calculated from the input power supply level detection circuit 10. [ In this case, the fixed-phase information generated by the fixed-phase-information generating circuit 15 includes combinations of R-phase and S-phase, S-phase and T-phase, T-phase and R-phase of the input 3 phase, And a total of six states indicating maximum recognition of the maximum recognition sound.

With the above configuration, the PWM cycled converter device of the present invention performs the three-phase input three-phase output operation when the power source abnormality is not generated, and uses only the battery 8 Phase alternating current output operation can be performed while absorbing the regenerative electric power by using only the regenerative capacitor 9 at the time of regeneration and when the regenerative capacitor 9 is not charged with electric charge, It is also possible to charge the regenerative capacitor 9 from the regenerator 8.

1: 3-phase AC power supply 2: Drive unit for elevator
3: motor 4: load device
5: Power switch 6: Input filter
7: Two-way switch module 8:
9: regenerative capacitor 10: input power level detection circuit
11: power supply failure detection circuit 12: gate driver
13: Control controller 14: Input power phase detection circuit
15: fixed phase information generating circuit 16: output current detecting circuit
17: Reverse regeneration discrimination circuit
18: Phase detection circuit changeover switch
19: Emergency power supply phase detection circuit
20: Phase detection circuit switching setting device 21: Emergency three-phase AC power source
22: Emergency single-phase AC power supply 23: Large capacity condenser
24: input filter reactor 25: input filter capacitor

Claims (6)

1. A PWM cycled converter device in which an input side is connected to a three-wire type power source and an output side is connected to a three-phase motor,
A bidirectional switch module including nine bidirectional switches connecting the three-wire power source and the three-phase motor,
An input power level detecting circuit for detecting a voltage value input from the three-wire power source and outputting an input voltage value;
An input power phase detection circuit for detecting the phase of the three-wire power supply and outputting an input power phase,
A fixed phase information generating circuit for generating and outputting a plurality of fixed phase information and selecting any one of the plurality of fixed phase information according to a control switching signal,
A phase detection circuit changeover switch for switching the input power supply phase and the selected fixed phase information according to an emergency power supply switching signal,
And a control controller for generating and outputting an on-off signal of the bidirectional switch module while switching the PWM method according to the emergency power source switching signal and the output of the phase detecting circuit changeover switch
Wherein the PWM converter is a PWM converter.

The method according to claim 1,
The control controller controls the on-off signal according to the PWM method of the three-phase AC input three-phase AC output based on the input power source phase and the input voltage level which is the output of the input power source level detection circuit, Off signal is generated by a PWM method of DC input three-phase AC output based on either the input voltage value or the plurality of fixed phase information.
3. The method according to claim 1 or 2,
An output current detection circuit for detecting an output current of the bidirectional switch module;
And a reverse regeneration discrimination circuit for generating a reverse regeneration discrimination signal based on an output voltage command output from the control controller and an output current detection value output from the output current detection circuit,
Wherein the control switching signal is the backward regenerative discrimination signal and the fixed phase information generating circuit generates the first fixed phase information indicating one line of the three-wire power supply when the backward regenerative discrimination signal discriminates the backward state And selects the second fixed phase information indicating the other one of the lines of the three-wire power source when the regenerating discrimination signal discriminates the regeneration state
Wherein the PWM converter is a PWM converter.
3. The method according to claim 1 or 2,
The three-wire power source includes a three-phase AC power source, a three-wire DC power source in which both terminals of the battery are connected between one line of three lines, and both terminals of a regenerative capacitor are connected between the other lines, And a power converter for converting the three-phase AC power source and the three-wire DC power source for outputting,
Wherein the control controller outputs the emergency power source switching signal to the power source switching device and switches the three-phase AC power source and the three-wire DC power source by the power source switching device in accordance with the emergency power source switching signal, Off signal by the PWM method of the three-phase alternating current three-phase alternating current output in which the voltage of the three-phase alternating current power source is inputted in accordance with the signal, Off signal is generated by a PWM method of input three-phase AC output, the first fixed phase information is phase information indicating a line between both terminals of the battery, and the second fixed phase information is Which is the phase information indicating between the lines to which both terminals of the regenerative capacitor are connected
Wherein the PWM converter is a PWM converter. 5. The method of claim 4,
And a power supply abnormality detecting circuit for detecting an abnormality of the three-phase AC power supply and outputting a power supply abnormality detection signal,
Wherein the emergency power source switching signal is the power source abnormality detection signal, and when the power source abnormality signal is not output, the power source switching device is switched to the three-phase AC power source, and when the power source abnormality detection signal is outputted, Phase alternating-current output of the three-phase alternating-current output by inputting the voltage of the three-phase alternating-current power supply when the abnormality detecting signal is not output, OFF signal by the PWM method of the DC input three-phase AC output, which receives the voltage of the three-wire DC power supply when the abnormality detection signal is outputted
Wherein the PWM converter is a PWM converter.
5. The method of claim 4,
Wherein the control controller is a bidirectional switch set comprising three bidirectional switches for connecting three phases in the bidirectional switch module to each phase of the input 3 and one phase of the output when the regenerative capacitor is charged, Switches off a bi-directional switch leading to an input connected to the common connection point of the battery and the regenerative capacitor in the set, and turns on all the two bidirectional switches connected to the other two inputs on the at least one bi- To-PWM converter.

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