WO2022107252A1 - 電力供給制御装置 - Google Patents
電力供給制御装置 Download PDFInfo
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- WO2022107252A1 WO2022107252A1 PCT/JP2020/043035 JP2020043035W WO2022107252A1 WO 2022107252 A1 WO2022107252 A1 WO 2022107252A1 JP 2020043035 W JP2020043035 W JP 2020043035W WO 2022107252 A1 WO2022107252 A1 WO 2022107252A1
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 79
- 238000001514 detection method Methods 0.000 claims abstract description 71
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 claims description 4
- 206010000117 Abnormal behaviour Diseases 0.000 claims 1
- 239000000470 constituent Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 31
- 238000004804 winding Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 8
- 230000005856 abnormality Effects 0.000 description 6
- 230000020169 heat generation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000001934 delay Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/327—Means for protecting converters other than automatic disconnection against abnormal temperatures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/14—Modifications for compensating variations of physical values, e.g. of temperature
- H03K17/145—Modifications for compensating variations of physical values, e.g. of temperature in field-effect transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/0812—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the control circuit
Definitions
- This technology is related to the power supply control device.
- it relates to power supply control by signal cutoff when an abnormality occurs in a power supply target or the like.
- a power supply control device that controls and supplies power to the motors that are the target of power supply.
- the power supply control device cuts off the drive signal sent to the power conversion device such as the inverter device to stop the power supply to the device.
- the safe stop circuit disclosed in Patent Document 1 is provided with an external power cutoff terminal for outputting a safe stop command.
- the means for opening and closing the external power cutoff terminal is not specified. For example, if the external power cutoff terminal is manually opened and closed to cut off the power, the functional safety standard may not be satisfied. Further, when the external power cutoff terminal is electrically opened and closed, it is necessary to provide a circuit outside the device to output a signal for operating the opening and closing of the external power cutoff terminal. In some cases, the configuration of the circuit that outputs a signal for operating the opening / closing of the external power cutoff terminal may not satisfy the functional safety standard.
- the safety stop device in Patent Document 1 described above is configured to maintain a safe state by using a latch circuit.
- the latch state in the latch circuit is released by the control device or the like executing software, it may be considered that the protection is performed through the software in terms of the functional safety standard.
- the power supply control device includes a power conversion device that performs power conversion and supplies power to the supply target, a control device that controls the operation of the power conversion device, and a current detection that detects the current flowing through the supply target.
- a control device based on the device, a comparison device that outputs a cutoff start signal in which the output logic is inverted when the current detection value by the current detected by the current detection device becomes larger than a predetermined set current threshold, and a control device based on the cutoff control signal.
- a latch device that performs a latch operation to maintain a state in which the current is cut off, and a delay device that outputs a latch release signal when a delay time determined by a component element elapses after the latch device starts the latch operation. Is.
- a comparison device that outputs a cutoff start signal from a current flowing through a supply target, a latch device that outputs a cutoff control signal, a cutoff device that cuts off a conversion operation signal from the control device, and a delay that outputs a latch release signal.
- the device consisted of hardware elements. Then, the delay time for outputting the latch release signal by the delay device is determined by the element configured by the delay device. Therefore, the latch operation can be released and the power supply can be returned to the normal state by the hardware configuration without relying on software.
- FIG. 5 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the motor control device 1 according to the first embodiment. It is a block diagram which shows one configuration example of the electric system centering on the electric motor control device 1 in Embodiment 2.
- FIG. 5 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the motor control device 1 according to the first embodiment.
- FIG. 5 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the U phase in the motor control device 1 according to the second embodiment. It is a block diagram which shows one configuration example of the electric system centering on the electric motor control device 1 in Embodiment 3.
- FIG. It is a figure which shows one configuration example of a latch device 24.
- FIG. 5 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the motor control device 1 according to the third embodiment. It is a block diagram which shows one configuration example of the electric system centering on the electric motor control device 1 in Embodiment 4.
- FIG. 5 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the motor control device 1 according to the fourth embodiment. It is a block diagram which shows one configuration example of the electric system centering on the electric motor control device 1 in Embodiment 6. It is a figure which shows one configuration example of a temperature determination apparatus 37. It is a figure which shows an example of the logic of a temperature determination apparatus 37. FIG. 5 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the motor control device 1 according to the sixth embodiment. It is a block diagram which shows one configuration example of the electric system centering on the electric motor control device 1 in Embodiment 7.
- FIG. 5 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the motor control device 1 according to the seventh embodiment.
- FIG. 1 is a block diagram showing a configuration example of an electric system centered on the electric motor control device 1 according to the first embodiment.
- the motor control device 1 serving as the power supply device in the first embodiment will be described.
- the electric motor control device 1 is a device that controls the power supply of the electric motor 3 to be supplied with electric power and performs drive control.
- the electric motor 3 in the first embodiment is a three-phase motor.
- the motor control device 1 of the first embodiment includes a power conversion device 2, a control device 6, a current detection device 4, a comparison device 8, a breaking device 7, a latch device 9, and a delay device 10.
- the power conversion device 2 is connected to the power supply 5.
- the control device 6 controls the conversion operation of the power conversion device 2 and controls the drive of the electric motor 3.
- the current detection device 4 detects the current at the location where the current detector 4a is installed and sends it to the control device 6.
- the comparison device 8 compares a predetermined current threshold value with a current detection value based on the current detected by the current detection device 4, and outputs a cutoff start signal based on the comparison.
- the cutoff device 7 performs a cutoff operation for cutting off the conversion operation signal output when the control device 6 causes the power conversion device 2 to perform the conversion operation.
- the latch device 9 performs a latch operation for maintaining the cutoff operation by the cutoff device 7 from the input of the cutoff start signal to the input of the latch release signal.
- the delay device 10 outputs a latch release signal when a delay time determined by a component element as hardware elapses after the latch device 9 starts the latch operation.
- the power supply 5 is a DC voltage power supply that supplies electric power to the electric motor 3 via the power conversion device 2.
- the power supply 5 uses a rectifying circuit (not shown) or the like to convert an AC voltage from an AC voltage power source such as a single-phase power supply (not shown) or a three-phase power supply (not shown) provided externally. It may be converted into a DC voltage and supplied to the power conversion device 2.
- an AC voltage power source such as a single-phase power supply (not shown) or a three-phase power supply (not shown) provided externally. It may be converted into a DC voltage and supplied to the power conversion device 2.
- FIG. 1 it is assumed that the motor control device 1 has a power supply 5, but the present invention is not limited to this.
- the power supply 5 may be an external power supply device.
- FIG. 2 is a diagram showing a configuration example when the power conversion device 2 in the first embodiment has an inverter circuit.
- the power conversion device 2 is a device that controls the power supply to the motor 3 by converting a DC voltage into an AC voltage based on a conversion operation signal sent from a control device 6 described later.
- the inverter circuit has a power module 2a.
- the power module 2a is a package in which an element that performs power conversion or the like is housed in a housing (module).
- the power module 2a houses six arms configured by connecting a switching element, which is a semiconductor element for electric power such as an IGBT, and a diode in parallel.
- each phase has three pairs of arms.
- the plurality of switching elements included in each arm are driven based on the conversion operation signal output by the control device 6 described later, and perform a switching operation of turning on or off at a predetermined timing.
- the control device 6 calculates a control amount required to control and drive the electric motor 3.
- the control amount is, for example, a voltage command value on the output side of the power conversion device 2.
- the control device 6 outputs a conversion operation signal that causes a conversion operation such that power is supplied to the electric motor 3 based on the controlled amount to the power conversion device 2.
- a gate drive signal is sent to the gate of the switching element housed in the power module 2a, and the switching element is driven to perform the conversion operation. Therefore, in the following, the gate drive signal will be described as being a conversion operation signal.
- the control device 6 is composed of, for example, a control arithmetic processing device such as a CPU (Central Processing Unit), a device such as a microcomputer having an analog circuit, a digital circuit, and the like.
- the current detection device 4 detects the three-phase current Iuvw flowing through the motor 3.
- the current detector 4 has a current detector 4a.
- the current detector 4a is, for example, a current transformer.
- the current detector 4a for detecting the current flowing in the U phase will be described.
- the position where the control device 6 detects the current used for control as data is not limited to the position shown in FIG.
- a current detection unit using a shunt resistor may be provided in the power conversion device 2 to perform current detection.
- the phase in which the current detection device 4 detects the current is not limited to the phase shown in FIG.
- the current detector 4a may detect the current of another phase.
- the U-phase and W-phase currents may be detected, and the current flowing through the DC line shown in FIG. 2 may be detected by the current detection unit provided in the power conversion device 2.
- the comparison device 8 outputs a signal that becomes a cutoff start signal by comparing the set current threshold value with the current detection value based on the current detected by the current detection device 4.
- the cutoff start signal is a signal whose logic is inverted depending on the magnitude relationship between the current detection value of the current detected by the current detection device 4 and the current threshold value.
- the cutoff start signal output by the comparison device 8 is a positive logic signal that becomes a high level when the current detection value is larger than the current threshold value, but may be a negative logic signal.
- the comparison device 8 is, for example, a comparator. The comparator compares the voltage that becomes the set current threshold value with the voltage related to the current detected by the current detection device 4.
- the set current threshold value for example, the voltage divided by the resistance in the electric power supplied for driving the control device 6 and the comparison device 8 is used.
- the voltage dividing resistance for dividing the voltage is selected so that the voltage applied to the current detected by the current detection device 4 becomes the current threshold when a current corresponding to the current value when the gate drive signal is desired to be cut off flows. Will be done.
- the voltage at different points may be used as the current threshold value for each current.
- the design values of the current threshold values for each current are made equal, reliability can be expected to be improved by setting the voltages at different locations, which are theoretically the same voltage, as the current threshold values for each current.
- the voltage at different locations that are theoretically the same voltage is, for example, a voltage obtained by dividing a voltage applied by the same power source using the resistances of different individuals having the same resistance value.
- FIG. 3 is an example of logic in the blocking device 7.
- the cutoff device 7 is a device that cuts off the gate drive signal according to the cutoff control signal input to the cutoff device 7.
- the shutoff device 7 is, for example, a three-state buffer. As shown in FIG. 3, in the cutoff device 7 which is a three-state buffer, if at least one of the cutoff control signals input to the control terminal 7a and the control terminal 7b shown in FIG. 1 is at a high level, the output is in a high impedance state. It becomes. When the output is in the high impedance state, the gate drive signal is not input to the power conversion device 2 and is cut off.
- the cutoff device 7 will be described as performing a cutoff operation for cutting off the gate drive signal when the cutoff control signal is at a high level, but cut off when the cutoff control signal is at a low level.
- the operation may be performed.
- FIG. 4 is an example of logic in the latch device 9.
- the latch device 9 is, for example, a flip-flop.
- the latch device 9 of the first embodiment inverts the output logic and maintains the output logic even after the cutoff start signal is no longer input.
- the latch release signal is input after the cutoff start signal is input, the latch device 9 inverts the output logic again and returns to the output state before the cutoff start signal is input.
- the latch release signal is a positive logic signal, but may be a negative logic signal.
- the latch device 9 of the first embodiment is a device that switches the output from the low level to the high level when the cutoff start signal is input, but the present invention is not limited to this. For example, it may be a device that switches the output from high level to low level when a cutoff start signal is input.
- FIG. 5 is a diagram showing a configuration example of the delay device 10.
- the delay device 10 outputs a latch release signal for releasing the latch operation of the latch device 9 when a delay time determined by the setting elapses after the cutoff control signal for starting the latch operation of the latch device 9 is input.
- the cutoff control signal output from the latch device 9 serves as a trigger for the delay device 10 to start operation.
- the delay device 10 shown in FIG. 5 when the signal reaches a high level, the N-channel MOSFET 16 is turned on and charging of the capacitor 15 is started. After that, when the voltage of the capacitor 15 rises, the output of the comparator 18 becomes high level, and the latch release signal is output.
- the time required to charge the capacitor 15 is determined by the capacitance of the capacitor 15 and the resistance value of the resistor 11. Using the time required to charge the capacitor 15, the cutoff control signal is input and then the latch release signal is output. Achieve a delay until In the delay device 10 shown in FIG. 5, the resistance values of the resistor 12, the resistor 13, and the resistor 14 have the same magnitude. At this time, the delay time from the input of the cutoff control signal to the output of the latch release signal is approximately 1.1 ⁇ the capacitance of the capacitor 15 ⁇ the resistance value [sec] of the resistor 11. In this way, the delay time is set by the element used as hardware.
- the P-channel MOSFET 17 When the cutoff control signal is no longer input, the P-channel MOSFET 17 is turned on, and the capacitor 15 is discharged via the P-channel MOSFET 17. When the capacitor 15 is discharged, the output of the comparator 18 becomes low level, and the output of the latch release signal is stopped.
- the delay time in the delay device 10 is necessary for the temperature of the motor 3 that has risen due to the overcurrent to decrease to an appropriate temperature, for example, in order to protect the motor 3 that is to be protected from the temperature rise due to the overcurrent. It is set to the operation suspension time of the electric motor 3.
- the operation pause time is, for example, when an operation of passing an overcurrent through the motor 3 to shut off the gate of the switching element of the power converter 2 is repeated at regular time intervals, the temperature of the motor 3 is less than the standard value. Experimentally determine and determine the time interval that can be guaranteed to saturate at temperature.
- the electric motor 3 to be supplied with electric power is a protection target, but it may be different.
- FIG. 6 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the motor control device 1 according to the first embodiment. Next, the operation of the motor control device 1 according to the first embodiment will be described.
- the comparison device 8 When an overcurrent occurs and the current value detected by the current detection device 4 becomes larger than the current threshold value, the comparison device 8 outputs a cutoff start signal (A1 in FIG. 6).
- the cutoff start signal When the cutoff start signal is output, the output of the latch device 9 is switched from the low level to the high level (B1 in FIG. 6).
- the output of the latch device 9 used as the cutoff control signal of the cutoff device 7 becomes high level, the output of the cutoff device 7 becomes a high impedance state (C1 in FIG. 6).
- the power conversion device 2 is stopped (D1 in FIG. 6).
- the latch device 9 maintains the logic of the output at a high level (F1 in FIG. 6).
- the time set by the delay device 10 elapses after the output of the latch device 9 which is the start signal of the delay device 10 reaches the high level, the output of the delay device 10 switches to the high level (G1 in FIG. 6).
- the output of the delay device 10 used as the latch release signal of the latch device 9 reaches a high level, the output of the latch device 9 switches to a low level (H1 in FIG. 6).
- the output of the latch device 9 When the output of the latch device 9 becomes low level, the output of the breaking device 7 is not in the high impedance state, so that the output of the breaking device 7 becomes low level or high level according to the gate drive signal (I1 in FIG. 6).
- the power conversion device 2 operates when the output of the cutoff device 7 is no longer in the high impedance state (J1 in FIG. 6).
- the output of the delay device 10 becomes low level (K1 in FIG. 6).
- control device 6 continues to output the gate drive signal during the period in which the cutoff device 7 is performing the cutoff operation, which is the period in which the output of the latch device 9 is at a high level. It is not limited. When the output of the latch device 9 reaches a high level, the control device 6 may stop the output of the gate drive signal.
- the gate drive signal can be cut off by using the three-phase current Iuvw flowing through the motor 3 as a trigger. Therefore, excessive heat generation of the electric motor 3 can be prevented.
- the three-phase current Iuvw flowing through the motor 3 it is not necessary to provide a circuit necessary for shutting off the gate outside the motor control device 1, and the circuit configuration can be relatively simplified.
- the gate drive signal when the gate is cut off, the gate drive signal is kept cut off, and the hardware is operated without software, so that the gate drive signal is cut off. It is possible to transition to the gate drive signal passing state.
- the software processing is not performed at the intended timing due to the runaway of the control device 6, and the time is faster than expected. It is possible to prevent dangerous operations such as transition from the gate drive signal cutoff state to the gate drive signal passing state.
- the delay time is set to be the operation suspension time of the electric motor 3 required for the temperature of the electric motor 3 which has risen due to the overcurrent to decrease to an appropriate temperature. Therefore, even when the control device 6 does not stop the output of the gate drive signal after the overcurrent is generated and the overcurrent repeatedly flows at regular time intervals, the motor 3 can be cooled. Therefore, excessive heat generation of the electric motor 3 can be prevented.
- FIG. 7 is a block diagram showing a configuration example of an electric system centered on the electric motor control device 1 according to the second embodiment.
- the motor control device 1 of the second embodiment in addition to the combination of the current detection device 4, the comparison device 8, the latch device 9 and the delay device 10, the current detection device 19, the comparison device 21, the latch device 22 and the delay device 23 are further provided. The difference is that they have a combination of.
- the motor control device 1 of the second embodiment is different in that it has a cutoff device 20.
- the cutoff device 20 having the same configuration as the cutoff device 7 is used, but the present invention is not limited to this.
- one device may have an inverting buffer and the other device may have a non-inverting buffer configuration.
- one of the cutoff device 7 and the cutoff device 20 installed in the signal path between the control device 6 and the power conversion device 2 performs a cutoff operation, so that the gate drive signal is cut off.
- the same components as those described in the first embodiment are designated by the same reference numerals.
- the configuration of the motor control device 1 of the second embodiment will be described. Here, the points different from the first embodiment will be described.
- the current detection device 4 detects the U-phase current as in the first embodiment.
- the current detection device 19 of the second embodiment detects the W phase current.
- the position where the current is detected as in the first embodiment of the second embodiment is not limited to the position shown in FIG. 7.
- the output of the current detection device 4 is input to the comparison device 8, and the output of the current detection device 19 is input to the comparison device 21.
- the output of the comparison device 8 is input to the latch device 9 and the delay device 10
- the output of the comparison device 21 is input to the latch device 22 and the delay device 23.
- the output of the delay device 10 is input to the latch device 9, and the output of the delay device 23 is input to the latch device 22.
- the output of the latch device 9 is input to the breaking device 7 and the breaking device 20, and the output of the latch device 22 is input to the breaking device 7 and the breaking device 20.
- the connection destinations of the latch device 9 and the latch device 22 are not limited to the positions shown in FIG. 7.
- the output of the latch device 9 may be input to the breaking device 7, and the output of the latch device 22 may be input to the breaking device 20.
- FIG. 8 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the U phase in the motor control device 1 according to the second embodiment. Next, the operation of the motor control device 1 according to the second embodiment will be described.
- the comparison device 8 When an overcurrent occurs in the U phase and the current value detected by the current detection device 4 becomes larger than the current threshold value, the comparison device 8 outputs a cutoff start signal (A2 in FIG. 8). When the cutoff start signal is output, the output of the latch device 9 is switched from the low level to the high level (B2 in FIG. 8). When the output of the cutoff control signal of the cutoff device 7 and the output of the latch device 9 used as the cutoff control signal of the cutoff device 20 become high level, the output of the cutoff device 7 and the output of the cutoff device 20 are in a high impedance state ( C2) in FIG.
- the power conversion device 2 is stopped (D2 in FIG. 8). After that, the current value detected by the current detection device 4 becomes smaller than the current threshold value, and the output of the cutoff start signal is stopped (E2 in FIG. 8). However, even if the output of the cutoff start signal is stopped, the latch device 9 maintains the logic of the output at a high level (F2 in FIG. 8). When the delay time set by the delay device 10 elapses after the output of the latch device 9 which is the start signal of the delay device 10 reaches the high level, the output of the delay device 10 switches to the high level (G2 in FIG. 8).
- the output of the latch device 9 switches to a low level (H2 in FIG. 8).
- the cutoff control signal which is the output of the latch device 9
- the cutoff control signal which is the output of the latch device 9
- the cutoff control signal becomes low level
- the output of the cutoff device 7 and the output of the cutoff device 20 are not in the high impedance state. Therefore, the output of the cutoff device 7 and the output of the cutoff device 20 are at a low level or a high level depending on the gate drive signal (I2 in FIG. 8).
- the gate drive signal is input to the power conversion device 2 and the power conversion device 2 operates (J2 in FIG. 8). Further, when the output of the latch device 9 becomes low level, the output of the delay device 10 becomes low level (K2 in FIG. 8).
- the U phase current is used as the W phase current
- the comparison device 8 is used as the comparison device 21
- the latch device 9 is used as the latch device 22.
- the delay device 10 is replaced with the delay device 23.
- the motor control device 1 makes the device related to protection redundant by providing a plurality of combinations of a current detection device 4, a comparison device 8, a breaking device 7, a latch device 9, and a delay device 10. Can be transformed into. Therefore, the safety reliability in the system is improved.
- Embodiment 3 The motor control device 1 of the third embodiment is different from the motor control device 1 of the first embodiment in that the latch device 9 includes the function of the delay device 10 described in the first embodiment.
- the same reference numerals are given to the same configurations as those described in the first embodiment.
- FIG. 9 is a block diagram showing a configuration example of an electric system centered on the motor control device 1 in the third embodiment.
- the configuration of the motor control device 1 of the third embodiment will be described.
- the differences from the first embodiment will be described.
- the electric motor control device 1 of the third embodiment is different from the electric motor control device 1 of the first embodiment in that it has the latch device 24.
- FIG. 10 is a diagram showing a configuration example of the latch device 24.
- the latch device 24 shown in FIG. 10 is configured by using a timer IC device 50, a resistor 35, a capacitor 31, and a NOT gate 26.
- the timer IC device 50 represented by the broken line portion in FIG. 10 is a device that delays the time of the input signal and outputs the signal.
- the timer IC device 50 is a circuit configured by combining the functions of a flip-flop 25, a NOT gate 27, a comparator 28, a comparator 29, an N-channel MOSFET 30, a resistor 32, a resistor 33, and a resistor 34.
- the output of the comparator 29 becomes high level and the output of the flip-flop 25 becomes low level.
- the output of the latch device 24 becomes high level due to the NOT gate 27 in the subsequent stage of the flip-flop 25. Due to the action of the flip-flop 25, the logic of the output is maintained even after the cutoff start signal is no longer input.
- the N-channel MOSFET 30 is turned off and charging of the capacitor 31 is started. After that, when the voltage of the capacitor 31 rises, the output of the comparator 28 becomes a high level, and the output of the flip-flop 25 becomes a high level.
- the output of the flip-flop 25 becomes high level
- the output of the latch device 24 becomes low level due to the NOT gate 27 in the subsequent stage of the flip-flop 25.
- the N-channel MOSFET 30 is turned on, and the capacitor 31 is discharged via the N-channel MOSFET 30.
- the time required to charge the capacitor 31 is determined by the capacitance of the capacitor 31 and the resistance value of the resistor 35. The time required to charge the capacitor 31 determines how long the output of the latch device 24 remains at a high level. In the latch device 24 shown in FIG.
- the time for the output of the latch device 24 to maintain a high level is approximately 1.1 ⁇ a capacitor.
- FIG. 11 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the motor control device 1 according to the third embodiment. Next, the operation of the motor control device 1 according to the third embodiment will be described.
- the comparison device 8 When an overcurrent occurs and the current detection value detected by the current detection device 4 becomes larger than the current threshold value, the comparison device 8 outputs a cutoff start signal (A3 in FIG. 11).
- the cutoff start signal When the cutoff start signal is output, the output of the latch device 24 is switched from the low level to the high level (B3 in FIG. 11).
- the output of the latch device 24 used as the cutoff control signal of the cutoff device 7 becomes high level, the output of the cutoff device 7 becomes a high impedance state (C3 in FIG. 11).
- the power conversion device 2 is stopped (D3 in FIG. 11).
- the latch device 24 maintains the logic of the output at a high level (F3 in FIG. 11).
- the time set by the latch device 24 elapses after the output of the latch device 24 reaches the high level, the output of the latch device 24 switches to the low level (G3 in FIG. 11).
- the output of the latch device 24 becomes low level, the output of the breaking device 7 is not in the high impedance state, so that the output of the breaking device 7 becomes low level or high level according to the gate drive signal (H3 in FIG. 11).
- the power conversion device 2 operates when the output of the cutoff device 7 is no longer in the high impedance state (I3 in FIG. 11).
- the latch device 24 can be configured by using the general-purpose timer IC device 50, so that it can be relatively easily configured. Further, the number of parts can be reduced by configuring using the general-purpose timer IC device 50.
- Embodiment 4 The motor control device 1 of the fourth embodiment is different from the motor control device 1 of the first embodiment in that a constraint condition is added regarding the method of setting the delay time.
- the same reference numerals are given to the same configurations as those described in the first embodiment.
- FIG. 12 is a block diagram showing a configuration example of an electric system centered on the motor control device 1 in the fourth embodiment.
- the configuration of the motor control device 1 of the fourth embodiment will be described.
- the differences from the first embodiment will be described.
- the cutoff start signal output by the comparison device 8 is also input to the control device 6. Then, the control device 6 stops the output of the gate drive signal when an abnormality occurs, based on the cutoff start signal.
- the time for the control device 6 to stop outputting the gate drive signal when an abnormality occurs is set by the software executed by the control device 6.
- the gate drive signal output stop time set by the software is, for example, the maximum pause time that the system in which the motor control device 1 is mounted can tolerate.
- the delay time set in the delay device 10 is set to be equal to or less than the gate drive signal output stop time set by the software. Therefore, the hardware of the delay device 10 is composed of elements in consideration of the gate drive signal output stop time.
- FIG. 13 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the motor control device 1 according to the fourth embodiment. Next, the operation of the motor control device 1 according to the fourth embodiment will be described.
- the control device 6 stops the output of the gate drive signal (A4 in FIG. 13).
- the time set by the delay device 10 elapses after the output of the latch device 9 reaches the high level, the output of the latch device 9 switches to the low level (B4 in FIG. 13).
- the output of the latch device 9 becomes low level, the output of the breaking device 7 is no longer in the high impedance state, and the output of the breaking device 7 becomes low level (C4 in FIG. 13).
- the gate drive signal output stop time set by the software elapses after the control device 6 stops outputting the gate drive signal, the control device 6 outputs the gate drive signal (D4 in FIG. 13).
- the output of the cutoff device 7 becomes low level or high level depending on the gate drive signal (E4 in FIG. 13).
- the delay time in the delay device 10 is larger than the gate drive signal output stop time set by the software, if an overcurrent false detection occurs, the motor control device 1 is allowed by the system in which the motor control device 1 is mounted. Stop more than you can. Therefore, the operation of the system may be adversely affected.
- the delay time of the delay device 10 is set to be equal to or less than the gate drive signal output stop time set by software. Therefore, even if an overcurrent is erroneously detected, there is no adverse effect on the operation of the system.
- Embodiment 5 The motor control device 1 of the fifth embodiment is different from the first embodiment in that a constraint condition is added regarding the method of setting the current threshold value.
- the same reference numerals are given to the same configurations as those described in the first embodiment.
- the control device 6 receives a gate drive signal when the output of the current detection device 4 input to the control device 6 is larger than the software current threshold set by the software executed by the control device 6. It stops the output of.
- the software current threshold value is, for example, a current value at which the permanent magnet is not demagnetized.
- the set current threshold value set in the comparison device 8 is made larger than the software current threshold value. As described above, the set current threshold value is set by the voltage dividing resistor.
- the configuration of the motor control device 1 in the fifth embodiment is the same as the configuration of the first embodiment.
- the control device 6 operates normally, when an overcurrent flows, the output of the current detection device 4 input to the control device 6 becomes larger than the software current threshold value, and the control device 6 stops the output of the gate drive signal.
- the control device 6 stops the output of the gate drive signal.
- the power conversion device 2 is stopped.
- the control device 6 does not operate normally, the control device 6 cannot stop the output of the gate drive signal even if an overcurrent flows. Since the gate drive signal is not cut off, an overcurrent flows further, and the output of the current detection device 4 becomes larger than the current threshold value input to the comparison device 8.
- the gate drive signal stop operation by the control device 6 is performed earlier than the gate drive signal cutoff operation by the cutoff device 7.
- the gate drive signal output stop time which is the time for stopping the signal when an overcurrent occurs
- the restart interval can be adjusted according to the system in which the motor control device 1 is mounted.
- the gate drive signal cutoff operation by the cutoff device 7 is a preliminary protection operation when the control device 6 does not operate normally, thereby improving the reliability in terms of safety and in terms of use. It is possible to achieve both the convenience of.
- Embodiment 6 The motor control device 1 of the sixth embodiment is different from the first embodiment in that the means for releasing the latch state in the latch device 9 is different.
- the same components as those described in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.
- FIG. 14 is a block diagram showing a configuration example of an electric system centered on the motor control device 1 in the sixth embodiment.
- the configuration of the motor control device 1 of the sixth embodiment will be described.
- the differences from the first embodiment will be described.
- the motor control device 1 of the sixth embodiment has a temperature detection device 36.
- the temperature determination device 37 is provided. Therefore, in the sixth embodiment, the output of the temperature determination device 37 becomes the latch release signal of the latch device 9.
- the temperature detection device 36 detects the winding temperature of the motor 3 to be protected, which protects against the temperature rise due to the power supply. Then, the temperature detection device 36 outputs the detected temperature as a detected temperature value.
- the temperature detection device 36 is, for example, a thermistor.
- the temperature detected by the temperature detecting device 36 is not limited to the winding temperature of the electric motor 3.
- the temperature detecting device 36 may detect the temperature of the wiring connecting the power conversion device 2 and the electric motor 3. Further, although the parts of the electric motor 3 to be supplied with electric power are protected, they may be different.
- FIG. 15 is a diagram showing a configuration example of the temperature determination device 37.
- FIG. 16 is a diagram showing an example of the logic of the temperature determination device 37.
- FIG. 16 shows a truth table of the temperature determination device 37.
- the temperature threshold is set to a temperature sufficiently smaller than the standard value of the winding temperature of the motor 3.
- the temperature threshold value is obtained, for example, by subtracting a value including a margin from the maximum value of the temperature rise of the winding due to one overcurrent from the standard value of the winding temperature of the motor 3.
- FIG. 17 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the motor control device 1 according to the sixth embodiment. Next, the operation of the motor control device 1 according to the sixth embodiment will be described.
- the output of the temperature determination device 37 becomes a low level (B5 in FIG. 17).
- the output of the latch device 9 is switched from the low level to the high level, the output of the breaking device 7 becomes a high impedance state, and the current does not flow to the motor 3, so that the winding temperature drops (C5 in FIG. 17).
- the output of the temperature determination device 37 switches from the low level to the high level (D5 in FIG. 17).
- the output of the latch device 9 switches to a low level (E5 in FIG. 17).
- the output of the temperature determination device 37 switches from high level to low level (F5 in FIG. 17).
- the output of the breaking device 7 is not in the high impedance state, so that the output of the breaking device 7 becomes low level or high level depending on the gate drive signal (G5 in FIG. 17).
- the power conversion device 2 operates when the output of the cutoff device 7 is no longer in the high impedance state (H5 in FIG. 17).
- the motor control device 1 of the sixth embodiment if the temperature of the protected component such as the motor 3 is higher than the set value, the cutoff state of the gate drive signal can be maintained. As a result, even when the control device 6 does not stop the output of the gate drive signal after the overcurrent occurs and the overcurrent repeatedly flows at regular time intervals, the protected component can be appropriately cooled, and the protected component can be appropriately cooled. It is possible to prevent excessive heat generation. Further, the motor control device 1 of the sixth embodiment can perform a series of operations related to gate interruption by a hardware configuration without using software. Therefore, according to the functional safety standard, it is not considered that protection is performed through software. Therefore, it is not necessary to conform to the software standard.
- Embodiment 7 The motor control device 1 of the seventh embodiment is different from the motor control device 1 of the first embodiment in that it performs abnormality determination based on temperature.
- the same reference numerals are given to the same configurations as those described in the first embodiment.
- FIG. 18 is a block diagram showing a configuration example of an electric system centered on the motor control device 1 in the seventh embodiment.
- the configuration of the motor control device 1 of the seventh embodiment will be described.
- the motor control device 1 of the seventh embodiment includes a power conversion device 2, a control device 6, a temperature detection device 36, a temperature comparison device 40, and a shutoff device 7.
- the power conversion device 2, the control device 6, and the cutoff device 7 perform the same operations as those described in the first embodiment.
- the temperature detection device 36 detects the winding temperature of the motor 3 to be protected and outputs the detected temperature as the detected temperature value, as in the sixth embodiment.
- the temperature detected by the temperature detecting device 36 is not limited to the winding temperature of the electric motor 3. Further, although the parts of the electric motor 3 to be supplied with electric power are protected, they may be different. Then, in the seventh embodiment, the output of the temperature comparison device 40 becomes the cutoff control signal of the cutoff device 7.
- FIG. 19 is a diagram showing a configuration example of the temperature comparison device 40.
- the temperature comparison device 40 shown in FIG. 19 is composed of a comparator 41, a resistor 42, a resistor 43, and a resistor 44.
- the temperature comparison device 40 is a device having a hysteresis characteristic, and the temperature comparison device 40 compares the temperature threshold value with the detected temperature value detected by the temperature detection device 36.
- the output of the temperature comparison device 40 serves as a cutoff control signal of the cutoff device 7.
- FIG. 20 is a diagram showing an example of input / output characteristics of the temperature comparison device 40.
- the upper temperature threshold value and the lower temperature threshold value are determined according to the temperature threshold value input to the temperature comparison device 40.
- the temperature comparison device 40 switches the output from the low level to the high level when the temperature to be compared with the temperature threshold rises and the temperature to be compared becomes larger than the upper temperature threshold. Further, when the comparison target temperature drops, the temperature comparison device 40 switches the output from the high level to the low level when the comparison target temperature becomes smaller than the lower temperature threshold value.
- the upper temperature threshold is set to a temperature smaller than the standard value of the winding temperature of the motor 3.
- the upper temperature threshold value is, for example, a temperature 10 ° C. smaller than the standard value of the winding temperature of the electric motor 3.
- the lower temperature threshold is a temperature smaller than the upper temperature threshold.
- the lower temperature threshold is, for example, a temperature 10 ° C. lower than the upper temperature threshold.
- FIG. 21 is a diagram showing a time chart showing a signal change related to a gate cutoff operation when an overcurrent occurs in the motor control device 1 according to the seventh embodiment. Next, the operation of the motor control device 1 according to the seventh embodiment will be described.
- the output of the temperature comparing device 40 becomes a high level (FIG. 20). A6).
- the output of the temperature comparison device 40 used as the cutoff control signal of the cutoff device 7 reaches a high level, the output of the cutoff device 7 becomes a high impedance state (B6 in FIG. 20).
- the power conversion device 2 is stopped (C6 in FIG. 20).
- the output of the cutoff device 7 When the output of the cutoff device 7 is in a high impedance state, no current flows through the electric motor 3, so that the winding temperature drops (D6 in FIG. 20). After that, when the winding temperature becomes smaller than the lower temperature threshold value, the output of the temperature comparison device 40 switches from the high level to the low level (E6 in FIG. 20). When the output of the temperature comparison device 40 becomes low level, the output of the breaking device 7 is not in the high impedance state, so that the output of the breaking device 7 becomes low level or high level depending on the gate drive signal (F6 in FIG. 20). ). The power conversion device 2 operates when the output of the cutoff device 7 is no longer in the high impedance state (G6 in FIG. 20).
- the motor control device 1 of the seventh embodiment when the temperature of the protected component such as the motor 3 becomes higher than the upper temperature threshold value, the gate drive signal is cut off. Then, the cutoff state of the gate drive signal can be maintained until the temperature of the protected component such as the motor 3 becomes smaller than the lower temperature threshold value. As a result, the gate drive signal can be cut off before the temperature of the protected component becomes higher than the standard value, and it is possible to prevent the temperature of the protected component from becoming higher than the standard value. Further, even when the control device 6 does not stop the output of the gate drive signal after the overcurrent is generated and the overcurrent repeatedly flows at regular time intervals, the protected component can be appropriately cooled, and the protected component can be cooled.
- the temperature comparison device 40 since the temperature comparison device 40 has the hysteresis characteristic, the temperature comparison device 40 can perform the latch start operation and the latch release operation. Therefore, the circuit configuration can be relatively simplified and the number of parts can be reduced. Then, the motor control device 1 of the seventh embodiment can perform a series of operations related to the gate cutoff by hardware without using software. Therefore, according to the functional safety standard, it is not considered that protection is performed through software. Therefore, it is not necessary to conform to the software standard.
- Embodiment 8 The above-mentioned effects can also be obtained by combining the configurations in any two or more of the above-described embodiments 1 to 7.
- 1 electric machine control device 2 power conversion device, 2a power module, 3 electric machine, 4 current detection device, 4a current detector, 5 power supply, 6 control device, 7 cutoff device, 7a, 7b control terminal, 8 comparison device, 9 latch Equipment, 10 delay equipment, 11, 12, 13, 14 resistors, 15 capacitors, 16 N channel MOSFETs, 17 P channel MOSFETs, 18 comparators, 19 current detectors, 20 cutoff equipment, 21 comparison equipment, 22 latch equipment, 23 delays.
- Equipment 24 latch equipment, 25 flip flop, 26, 27 NOT gate, 28, 29 comparator, 30 N channel MOSFET, 31 condenser, 32, 33, 34, 35 resistance, 36 temperature detector, 37 temperature determination device, 38 comparator , 39 AND gate, 40 temperature comparison device, 41 comparator, 42, 43, 44 resistor, 50 timer IC device.
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Abstract
Description
図1は、実施の形態1における電動機制御装置1を中心とする電動システムの一構成例を示すブロック図である。本実施の形態1において電力供給装置となる電動機制御装置1について説明する。
図7は、実施の形態2における電動機制御装置1を中心とする電動システムの一構成例を示すブロック図である。実施の形態2の電動機制御装置1は、電流検出装置4、比較装置8、ラッチ装置9および遅延装置10の組み合わせに加え、さらに、電流検出装置19、比較装置21、ラッチ装置22および遅延装置23の組み合わせを有する点が異なる。また、実施の形態2の電動機制御装置1は、遮断装置20を有する点が異なる。ここでは、遮断装置7と同じ構成の遮断装置20とするが、これに限定するものではない。たとえば、一方の装置が反転バッファで、もう一方の装置が非反転バッファの構成であってもよい。そして、制御装置6と電力変換装置2との間の信号路に設置された遮断装置7および遮断装置20のいずれか一方が遮断動作を行うことで、ゲート駆動信号が遮断される構成である。本実施の形態2においては、実施の形態1で説明した構成と同一の構成には、同一の符号を付す。
本実施の形態3の電動機制御装置1は、実施の形態1の電動機制御装置1と比較すると、ラッチ装置9が実施の形態1で説明した遅延装置10の機能を包含している点が異なる。本実施の形態3においては、実施の形態1で説明した構成と同一の構成に同一の符号を付す。
本実施の形態4の電動機制御装置1は、実施の形態1の電動機制御装置1と比較すると、遅延時間の設定方法に関して制約条件が追加されている点が異なる。本実施の形態4においては、実施の形態1で説明した構成と同一の構成に同一の符号を付す。
本実施の形態5の電動機制御装置1は、実施の形態1と比較すると、電流閾値の設定方法に関して、制約条件が追加されている点が異なる。本実施の形態5においては、実施の形態1で説明した構成と同一の構成に同一の符号を付す。
本実施の形態6の電動機制御装置1は、実施の形態1と比較すると、ラッチ装置9におけるラッチ状態を解除する手段が異なる。本実施の形態6においては、実施の形態1で説明した構成と同一の構成に同一の符号を付し、その詳細な説明を省略する。
本実施の形態7の電動機制御装置1は、実施の形態1の電動機制御装置1と比較すると、温度による異常判定を行っている点が異なる。本実施の形態7においては、実施の形態1で説明した構成と同一の構成に同一の符号を付す。
上述した実施の形態1~実施の形態7のうち、いずれか2つ以上の実施の形態における構成を組み合わせても、上述した効果を得ることができる。
Claims (12)
- 電力変換を行って、供給対象に電力を供給する電力変換装置と、
前記電力変換装置の動作を制御する制御装置と、
前記供給対象に流れる電流を検出する電流検出装置と、
前記電流検出装置が検出した電流による電流検出値が予め決められた設定電流閾値より大きくなると出力の論理が反転する遮断開始信号を出力する比較装置と、
遮断制御信号に基づいて、前記制御装置が前記電力変換装置に出力する変換動作信号を遮断する遮断装置と、
前記比較装置が出力する前記遮断開始信号に基づいて前記遮断制御信号を出力し、ラッチ解除信号が入力されるまで、前記遮断装置に前記変換動作信号を遮断している状態を維持させるラッチ動作を行うラッチ装置と、
前記ラッチ装置が前記ラッチ動作を開始してから、構成素子によって決まる遅延時間が経過すると、ラッチ解除信号を出力する遅延装置と
を備える電力供給制御装置。 - 前記ラッチ装置は、
前記比較装置が出力する信号と前記遅延装置が出力する信号とを入力として、前記ラッチ動作を行う請求項1に記載の電力供給制御装置。 - 前記電流検出装置、前記比較装置、前記ラッチ装置、前記遅延装置および前記遮断装置の組み合わせを複数備え、
少なくとも1つの前記組み合わせにおいて、前記電流検出装置の検出に係る前記電流検出値が前記設定電流閾値より大きければ、前記遮断装置は、前記変換動作信号を遮断する請求項1または請求項2に記載の電力供給制御装置。 - 前記制御装置は、
前記供給対象および前記電力変換装置の少なくとも一方が異常な挙動を示したものと判定すると、信号出力停止時間、前記変換動作信号の出力を停止し、
前記信号出力停止時間は、前記制御装置が実行するソフトウェアによって設定される時間であり、前記ラッチ装置が前記ラッチ動作を開始してから前記ラッチ解除信号が出力されるまでの時間以上の時間である請求項1~請求項3のいずれか一項に記載の電力供給制御装置。 - 前記制御装置は、
前記電流検出値が、前記設定電流閾値より小さく、前記ソフトウェアにより設定されるソフトウェア電流閾値より大きいと判定すると、前記変換動作信号の出力を停止する請求項4に記載の電力供給制御装置。 - 前記遅延時間は、前記遅延装置が有する抵抗の抵抗値とコンデンサの静電容量とで決まる時間である請求項1~請求項5のいずれか一項に記載の電力供給制御装置。
- 前記遅延時間は、電力供給による温度上昇からの保護を行う保護対象の温度を、定められた設定温度に下げる時間に設定する請求項1~請求項6のいずれか一項に記載の電力供給制御装置。
- 前記ラッチ装置は、
タイマIC装置である請求項1~請求項7のいずれか一項に記載の電力供給制御装置。 - 前記制御装置は、
前記遮断開始信号に基づいて、前記変換動作信号を停止する請求項1~請求項8のいずれか一項に記載の電力供給制御装置。 - 電力変換を行って、供給対象に電力を供給する電力変換装置と、
前記電力変換装置の動作を制御する制御装置と、
前記供給対象に流れる電流を検出する電流検出装置と、
前記電流検出装置が検出した電流による電流検出値が予め決められた設定電流閾値より大きくなると出力の論理が反転する遮断開始信号を出力する比較装置と、
遮断制御信号に基づいて、前記制御装置が前記電力変換装置に出力する変換動作信号を遮断する遮断装置と、
前記比較装置が出力する前記遮断開始信号に基づいて前記遮断制御信号を出力し、ラッチ解除信号が入力されるまで、前記遮断装置に前記変換動作信号を遮断している状態を維持させるラッチ動作を行うラッチ装置と、
電力供給による温度上昇からの保護を行う保護対象の温度を検出する温度検出装置と、
前記温度検出装置の検出に係る検出温度値、予め決められた温度閾値および前記ラッチ装置からの前記遮断制御信号に基づいて、前記ラッチ解除信号を出力する温度判定装置とを備え、
前記温度判定装置は、前記ラッチ装置が前記変換動作信号を遮断する前記遮断制御信号を出力している状態で、前記検出温度値が前記温度閾値より小さくなると、前記ラッチ解除信号を出力する電力供給制御装置。 - 電力変換を行って、供給対象に電力を供給する電力変換装置と、
前記電力変換装置の動作を制御する制御装置と、
前記供給対象に流れる電流を検出する電流検出装置と、
前記電流検出装置が検出した電流による電流検出値が予め決められた設定電流閾値より大きくなると出力の論理が反転する遮断開始信号を出力する比較装置と、
遮断制御信号に基づいて、前記制御装置が前記電力変換装置に出力する変換動作信号を遮断する遮断装置と、
電力供給による温度上昇からの保護を行う保護対象の温度を検出する温度検出装置と、
前記温度検出装置の検出に係る検出温度値、並びに、予め決められた上位温度閾値および前記上位温度閾値より小さい下位温度閾値に基づいて、前記検出温度値が前記上位温度閾値より大きくなると前記遮断制御信号を出力し、前記検出温度値が前記下位温度閾値より小さくなるまで前記遮断制御信号を出力する温度比較装置と
を備える電力供給制御装置。 - 前記電力変換装置は、
直流電圧を交流電圧に変換して、前記交流電圧による電力を前記供給対象に供給する請求項1~請求項11のいずれか一項に記載の電力供給制御装置。
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JP2004304924A (ja) * | 2003-03-31 | 2004-10-28 | Toyota Industries Corp | 電源装置 |
JP2005094938A (ja) * | 2003-09-18 | 2005-04-07 | Matsushita Electric Ind Co Ltd | インバータ装置 |
JP2014147210A (ja) * | 2013-01-29 | 2014-08-14 | Toshiba Mitsubishi-Electric Industrial System Corp | 静止形周波数変換電源装置 |
JP2019193410A (ja) * | 2018-04-24 | 2019-10-31 | 株式会社東芝 | 制御回路及びパワーモジュール |
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JP2000287456A (ja) | 1999-03-30 | 2000-10-13 | Sanyo Electric Co Ltd | Pwmインバータの波形発生装置 |
JPWO2008132975A1 (ja) | 2007-04-13 | 2010-07-22 | 株式会社安川電機 | 電力変換装置 |
JP7012634B2 (ja) | 2018-12-03 | 2022-01-28 | 東芝三菱電機産業システム株式会社 | Cvcf電源装置 |
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JP2004304924A (ja) * | 2003-03-31 | 2004-10-28 | Toyota Industries Corp | 電源装置 |
JP2005094938A (ja) * | 2003-09-18 | 2005-04-07 | Matsushita Electric Ind Co Ltd | インバータ装置 |
JP2014147210A (ja) * | 2013-01-29 | 2014-08-14 | Toshiba Mitsubishi-Electric Industrial System Corp | 静止形周波数変換電源装置 |
JP2019193410A (ja) * | 2018-04-24 | 2019-10-31 | 株式会社東芝 | 制御回路及びパワーモジュール |
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