CN110875707A - Power-down protection control method, device and system for permanent magnet synchronous motor - Google Patents
Power-down protection control method, device and system for permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN110875707A CN110875707A CN201811008365.3A CN201811008365A CN110875707A CN 110875707 A CN110875707 A CN 110875707A CN 201811008365 A CN201811008365 A CN 201811008365A CN 110875707 A CN110875707 A CN 110875707A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- magnet synchronous
- synchronous motor
- power
- voltage value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/025—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being a power interruption
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/022—Synchronous motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation
Abstract
The invention provides a power-down protection control method, a device and a system of a permanent magnet synchronous motor, wherein the power-down protection control method of the permanent magnet synchronous motor comprises the following steps: detecting a voltage value of the direct current bus module; judging whether the permanent magnet synchronous motor is powered off or not according to the voltage value; and if so, controlling the permanent magnet synchronous motor to enter a power generation state. According to the power-down protection control method, device and system for the permanent magnet synchronous motor, when the permanent magnet synchronous motor is powered down, the permanent magnet synchronous motor is controlled to enter a power generation state, so that the voltage formed by counter electromotive force instantaneously generated by the permanent magnet synchronous motor in a direct current bus module is lower than safe voltage, and component damage caused by overhigh voltage is avoided.
Description
Technical Field
The invention relates to the technical field of motor control, in particular to a power failure protection control method, device and system for a permanent magnet synchronous motor.
Background
The permanent magnet synchronous motor is a synchronous motor which generates a synchronous rotating magnetic field by permanent magnet excitation.
In the related art, when a permanent magnet synchronous motor runs at a high speed and enters a weak magnetic state, if an ac power supply side is powered off, the permanent magnet synchronous motor generates a large counter electromotive force, and a dc bus module for supplying power to an IPM is directly charged by an Intelligent Power Module (IPM), and the counter electromotive force generated instantaneously by the permanent magnet synchronous motor may cause a high voltage to be formed in the dc bus module, resulting in damage to components in the dc bus module.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first object of the present invention is to provide a power-down protection control method for a permanent magnet synchronous motor, which can determine whether the permanent magnet synchronous motor is powered down according to a voltage value of a dc bus module, and when the permanent magnet synchronous motor is powered down, control the permanent magnet synchronous motor to enter a power generation state, so that a voltage formed by a back electromotive force instantaneously generated by the permanent magnet synchronous motor in the dc bus module is lower than a safe voltage, thereby avoiding component damage caused by an excessively high voltage.
The second purpose of the invention is to provide a power failure protection control device of a permanent magnet synchronous motor.
A third object of the present invention is to provide a control system of a permanent magnet synchronous motor.
A fourth object of the invention is to propose an electronic device.
A fifth object of the invention is to propose a non-transitory computer-readable storage medium.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a power failure protection control method for a permanent magnet synchronous motor, including:
detecting a voltage value of the direct current bus module;
judging whether the permanent magnet synchronous motor is powered off or not according to the voltage value;
and if so, controlling the permanent magnet synchronous motor to enter a power generation state.
According to the power-down protection control method of the permanent magnet synchronous motor, provided by the embodiment of the invention, the voltage value of the direct current bus module is detected firstly, then whether the permanent magnet synchronous motor is powered down or not is judged according to the voltage value, and when the permanent magnet synchronous motor is powered down, the permanent magnet synchronous motor is controlled to enter a power generation state, so that the voltage formed by the counter electromotive force instantaneously generated by the permanent magnet synchronous motor in the direct current bus module is lower than the safe voltage, and the damage of components caused by overhigh voltage is avoided.
According to an embodiment of the present invention, the determining whether the permanent magnet synchronous motor is powered down according to the voltage value includes: and if the time length of the voltage value reduced from the first preset voltage value to the second preset voltage value is equal to or less than a preset time length threshold value, judging that the permanent magnet synchronous motor is powered off.
According to an embodiment of the present invention, the controlling the permanent magnet synchronous motor to enter a power generation state includes: and controlling the permanent magnet synchronous motor to enter a power generation state until the permanent magnet synchronous motor stops in a braking mode.
According to an embodiment of the present invention, the controlling the permanent magnet synchronous motor to enter the power generation state by braking includes: and setting a switch tube in the intelligent power module IPM to be in a high-resistance state so as to control the permanent magnet synchronous motor to enter a power generation state.
According to an embodiment of the present invention, the second preset voltage value is equal to or greater than 1/3 times the first preset voltage value and equal to or less than 2/3 times the first preset voltage value.
According to one embodiment of the invention, the duration threshold is equal to or less than 2 milliseconds.
In order to achieve the above object, a second embodiment of the present invention provides a power-down protection control device for a permanent magnet synchronous motor, including:
the detection module is used for detecting the voltage value of the direct current bus module;
the judging module is used for judging whether the permanent magnet synchronous motor is powered off or not according to the voltage value;
and the control module is used for controlling the permanent magnet synchronous motor to enter a power generation state if the control module is used for controlling the permanent magnet synchronous motor to enter the power generation state.
According to the power-down protection control device of the permanent magnet synchronous motor, provided by the embodiment of the invention, the voltage value of the direct current bus module is detected firstly, then whether the permanent magnet synchronous motor is powered down or not is judged according to the voltage value, and when the permanent magnet synchronous motor is powered down, the permanent magnet synchronous motor is controlled to enter a power generation state, so that the voltage formed by the counter electromotive force instantaneously generated by the permanent magnet synchronous motor in the direct current bus module is lower than the safe voltage, and the damage of components caused by overhigh voltage is avoided.
According to an embodiment of the present invention, the determining module is specifically configured to: and if the time length of the voltage value reduced from the first preset voltage value to the second preset voltage value is equal to or less than a preset time length threshold value, judging that the permanent magnet synchronous motor is powered off.
According to an embodiment of the present invention, the control module is specifically configured to: and controlling the permanent magnet synchronous motor to enter a power generation state until the permanent magnet synchronous motor stops in a braking mode.
According to an embodiment of the present invention, the control module is specifically configured to: and setting a switch tube in the intelligent power module IPM to be in a high-resistance state so as to control the permanent magnet synchronous motor to enter a power generation state.
In order to achieve the above object, a control system for a permanent magnet synchronous motor according to a third embodiment of the present invention includes: the power failure protection control device comprises a direct current bus module, a permanent magnet synchronous motor and the power failure protection control device of the permanent magnet synchronous motor implemented according to the second aspect of the invention.
To achieve the above object, a fourth aspect of the present invention provides an electronic device, including: the power failure protection control method for the permanent magnet synchronous motor comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the power failure protection control method for the permanent magnet synchronous motor is realized.
To achieve the above object, a fifth embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the power fail-safe control method for a permanent magnet synchronous motor according to the first embodiment of the present invention.
Drawings
Fig. 1 is a schematic view of an application scenario of a power down protection control method of a permanent magnet synchronous motor according to an embodiment of the present invention;
fig. 2 is a flowchart of a power down protection control method of a permanent magnet synchronous motor according to one embodiment of the present invention;
fig. 3 is a structural diagram of a power down protection control apparatus of a permanent magnet synchronous motor according to an embodiment of the present invention;
fig. 4 is a block diagram of a control system of a permanent magnet synchronous motor according to an embodiment of the present invention;
FIG. 5 is a block diagram of an electronic device in accordance with one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Fig. 1 is a schematic view of an application scenario of a power-down protection control method for a permanent magnet synchronous motor according to an embodiment of the present invention. The power-down protection control method of the permanent magnet synchronous motor according to the embodiment of the present invention may be applied to the control system of the permanent magnet synchronous motor shown in fig. 1, and specifically may be applied to the micro control module 37 in fig. 1. As shown in fig. 1, the ac power module 34 is used for supplying ac power to the rectifying module 35; the rectifying module 35 rectifies the alternating current and outputs the direct current to the direct current bus module 31; the dc bus module 31 provides dc power to the IPM module 36; the micro-control module 37 is used for sending a control command to the IPM module 36; the IPM module 36 controls the operation of the permanent magnet synchronous motor 32 according to the control command sent by the micro control module 37.
The following describes a power-down protection control method, device and system of a permanent magnet synchronous motor according to an embodiment of the present invention with reference to the accompanying drawings.
Fig. 2 is a flowchart of a power-down protection control method for a permanent magnet synchronous motor according to an embodiment of the present invention, which can be applied to the micro control module in fig. 1. As shown in fig. 2, the power-down protection control method for the permanent magnet synchronous motor includes:
and S101, detecting the voltage value of the direct current bus module.
In the embodiment of the invention, a resistor can be connected in parallel to the direct current bus module, the voltage values at two ends of the parallel resistor are detected in real time, and the voltage values at two ends of the parallel resistor are the voltage values of the direct current bus module.
And S102, judging whether the permanent magnet synchronous motor is powered off or not according to the voltage value.
In the embodiment of the invention, whether the permanent magnet synchronous motor is powered off or not is judged according to the voltage value detected in the step S101. As a possible implementation manner, if the time period for the voltage value to decrease from the first preset voltage value to the second preset voltage value is equal to or less than the preset time period threshold, it is determined that the permanent magnet synchronous motor is powered off, specifically, the first preset voltage value may be preset, the second preset voltage value is a time period threshold, and when it is detected that the time period for the voltage value to decrease from the first preset voltage value to the second preset voltage value is equal to or less than the time period threshold, it is determined that the permanent magnet synchronous motor is powered off. For example, 1/2 where the second preset voltage value is set as the first preset voltage value, and the duration threshold value is set as 1 ms, when it is detected that the time for the voltage value to decrease from the first preset voltage value to the first preset voltage value 1/2 (i.e., the second preset voltage value) is less than or equal to 1 ms, it is determined that the permanent magnet synchronous motor is powered down.
And S103, if so, controlling the permanent magnet synchronous motor to enter a power generation state.
In the embodiment of the invention, if the step S102 detects that the permanent magnet synchronous motor is powered off, the permanent magnet synchronous motor is controlled to enter a power generation state. As a possible implementation manner, the permanent magnet synchronous motor can be controlled to enter the power generation state by means of braking until the permanent magnet synchronous motor stops, and specifically, the switching tube in the intelligent power module IPM can be set to a high resistance state to control the permanent magnet synchronous motor to enter a power generation state, wherein, the IPM is used for supplying power for the permanent magnet synchronous motor, and the IPM can be internally provided with fault detection circuits such as overvoltage, overcurrent and overheat, and the like, and can be a three-phase bridge circuit formed by a plurality of switching tubes, for example, the IPM may be a three-phase bridge circuit composed of six Insulated Gate Bipolar Transistors (IGBTs), when the power failure of the permanent magnet synchronous motor is detected, the IGBT in the IPM is set to be in a high-resistance state so as to control the power generation amount of the permanent magnet synchronous motor, therefore, the voltage formed by the direct current bus module is lower than the safe voltage, and the damage of components caused by overhigh voltage is avoided.
According to the power-down protection control method of the permanent magnet synchronous motor, provided by the embodiment of the invention, the voltage value of the direct current bus module is detected firstly, then whether the permanent magnet synchronous motor is powered down or not is judged according to the voltage value, and when the permanent magnet synchronous motor is powered down, the permanent magnet synchronous motor is controlled to enter a power generation state, so that the voltage formed by the counter electromotive force instantaneously generated by the permanent magnet synchronous motor in the direct current bus module is lower than the safe voltage, and the damage of components caused by overhigh voltage is avoided.
Fig. 3 is a structural diagram of a power down protection control apparatus of a permanent magnet synchronous motor according to an embodiment of the present invention, which may be disposed in the micro control module in fig. 1. As shown in fig. 3, the power down protection control device of the permanent magnet synchronous motor includes:
the detection module 21 is used for detecting the voltage value of the direct current bus module;
the judging module 22 is used for judging whether the permanent magnet synchronous motor is powered off or not according to the voltage value;
and the control module 23 is configured to control the permanent magnet synchronous motor to enter a power generation state if the current is positive.
It should be noted that the foregoing explanation of the embodiments of the power-down protection control method for the permanent magnet synchronous motor is also applicable to the power-down protection control device for the permanent magnet synchronous motor, and is not repeated herein.
According to the power-down protection control device of the permanent magnet synchronous motor, provided by the embodiment of the invention, the voltage value of the direct current bus module is detected firstly, then whether the permanent magnet synchronous motor is powered down or not is judged according to the voltage value, and when the permanent magnet synchronous motor is powered down, the permanent magnet synchronous motor is controlled to enter a power generation state, so that the voltage formed by the counter electromotive force instantaneously generated by the permanent magnet synchronous motor in the direct current bus module is lower than the safe voltage, and the damage of components caused by overhigh voltage is avoided.
Further, in a possible implementation manner of the embodiment of the present invention, the determining module 22 is specifically configured to: and if the time length of the voltage value reduced from the first preset voltage value to the second preset voltage value is equal to or less than a preset time length threshold value, judging that the permanent magnet synchronous motor is powered off.
Further, in a possible implementation manner of the embodiment of the present invention, the control module 23 is specifically configured to: and controlling the permanent magnet synchronous motor to enter a power generation state until the permanent magnet synchronous motor stops in a braking mode.
Further, in a possible implementation manner of the embodiment of the present invention, the control module 23 is specifically configured to: and setting a switch tube in the intelligent power module IPM to be in a high-resistance state so as to control the permanent magnet synchronous motor to enter a power generation state.
It should be noted that the foregoing explanation of the embodiments of the power-down protection control method for the permanent magnet synchronous motor is also applicable to the power-down protection control device for the permanent magnet synchronous motor, and is not repeated herein.
According to the power-down protection control device of the permanent magnet synchronous motor, provided by the embodiment of the invention, the voltage value of the direct current bus module is detected firstly, then whether the permanent magnet synchronous motor is powered down or not is judged according to the voltage value, and when the permanent magnet synchronous motor is powered down, the permanent magnet synchronous motor is controlled to enter a power generation state, so that the voltage formed by the counter electromotive force instantaneously generated by the permanent magnet synchronous motor in the direct current bus module is lower than the safe voltage, and the damage of components caused by overhigh voltage is avoided.
In order to implement the foregoing embodiment, an embodiment of the present invention further provides a control system 30 of a permanent magnet synchronous motor, and as shown in fig. 4, the control system 30 of the permanent magnet synchronous motor includes: a direct current bus module 31, a permanent magnet synchronous motor 32 and a power down protection control device 33 of the permanent magnet synchronous motor as shown in the above embodiments.
In order to implement the foregoing embodiment, the embodiment of the present invention further provides an electronic device 40, as shown in fig. 5, which includes a memory 41 and a processor 42. The memory 41 stores a computer program that can be executed on the processor 42, and the processor 42 executes the program to implement the power-down protection control method of the permanent magnet synchronous motor as shown in the above embodiment.
In order to implement the foregoing embodiments, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for controlling power down protection of a permanent magnet synchronous motor according to the foregoing embodiments is implemented.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (13)
1. A power-down protection control method of a permanent magnet synchronous motor is characterized by comprising the following steps:
detecting a voltage value of the direct current bus module;
judging whether the permanent magnet synchronous motor is powered off or not according to the voltage value;
and if so, controlling the permanent magnet synchronous motor to enter a power generation state.
2. The power-down protection control method according to claim 1, wherein the determining whether the permanent magnet synchronous motor is powered down according to the voltage value includes:
and if the time length of the voltage value reduced from the first preset voltage value to the second preset voltage value is equal to or less than a preset time length threshold value, judging that the permanent magnet synchronous motor is powered off.
3. The power-fail protection control method according to claim 1, wherein the controlling the permanent magnet synchronous motor to enter a power generation state includes:
and controlling the permanent magnet synchronous motor to enter a power generation state until the permanent magnet synchronous motor stops in a braking mode.
4. The power-fail protection control method of claim 3, wherein the controlling the PMSM to enter a power generation state by means of braking comprises:
and setting a switch tube in the intelligent power module IPM to be in a high-resistance state so as to control the permanent magnet synchronous motor to enter a power generation state.
5. The power-down protection control method according to claim 2, wherein the second preset voltage value is equal to or greater than 1/3 times the first preset voltage value and equal to or less than 2/3 times the first preset voltage value.
6. The power fail safeguard control method of claim 2 wherein the duration threshold is equal to or less than 2 milliseconds.
7. The utility model provides a PMSM's power down protection controlling means which characterized in that includes:
the detection module is used for detecting the voltage value of the direct current bus module;
the judging module is used for judging whether the permanent magnet synchronous motor is powered off or not according to the voltage value;
and the control module is used for controlling the permanent magnet synchronous motor to enter a power generation state if the control module is used for controlling the permanent magnet synchronous motor to enter the power generation state.
8. The power-fail protection control device of claim 7, wherein the determining module is specifically configured to:
and if the time length of the voltage value reduced from the first preset voltage value to the second preset voltage value is equal to or less than a preset time length threshold value, judging that the permanent magnet synchronous motor is powered off.
9. The power-fail protection control device of claim 7, wherein the control module is specifically configured to:
and controlling the permanent magnet synchronous motor to enter a power generation state until the permanent magnet synchronous motor stops in a braking mode.
10. The power-fail protection control device of claim 9, wherein the control module is specifically configured to:
and setting a switch tube in the intelligent power module IPM to be in a high-resistance state so as to control the permanent magnet synchronous motor to enter a power generation state.
11. A control system of a permanent magnet synchronous motor, comprising: direct current bus module, PMSM and PMSM's power down protection controlling means of any one of claims 7-10.
12. An electronic device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of power down protection control of a permanent magnet synchronous motor according to any one of claims 1-6 when executing the program.
13. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the method of power fail safe control of a permanent magnet synchronous machine according to any of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811008365.3A CN110875707A (en) | 2018-08-31 | 2018-08-31 | Power-down protection control method, device and system for permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811008365.3A CN110875707A (en) | 2018-08-31 | 2018-08-31 | Power-down protection control method, device and system for permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110875707A true CN110875707A (en) | 2020-03-10 |
Family
ID=69714553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811008365.3A Pending CN110875707A (en) | 2018-08-31 | 2018-08-31 | Power-down protection control method, device and system for permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110875707A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1701503A (en) * | 2002-11-25 | 2005-11-23 | 特伯考尔公司 | Power circuit of high speed motor |
| CN202059321U (en) * | 2011-02-22 | 2011-11-30 | 艾默生网络能源有限公司 | Power unit of high pressure frequency converter |
| CN102804589A (en) * | 2009-06-22 | 2012-11-28 | 三菱电机株式会社 | Motor drive apparatus |
| CN103701367A (en) * | 2013-07-11 | 2014-04-02 | 北京航空航天大学 | Soft start control device for sensorless brushless direct current motor |
| JP2016132402A (en) * | 2015-01-21 | 2016-07-25 | トヨタ自動車株式会社 | vehicle |
| CN106232514A (en) * | 2013-12-17 | 2016-12-14 | 株式会社日立制作所 | The control device of elevator and control method thereof |
| CN206940152U (en) * | 2017-07-03 | 2018-01-30 | 蒂森克虏伯电梯（上海）有限公司 | Elevator safety drive system |
| CN108382934A (en) * | 2018-03-23 | 2018-08-10 | 日立电梯（中国）有限公司 | Elevator safety protects control method, apparatus and system |
-
2018
- 2018-08-31 CN CN201811008365.3A patent/CN110875707A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1701503A (en) * | 2002-11-25 | 2005-11-23 | 特伯考尔公司 | Power circuit of high speed motor |
| CN102804589A (en) * | 2009-06-22 | 2012-11-28 | 三菱电机株式会社 | Motor drive apparatus |
| CN202059321U (en) * | 2011-02-22 | 2011-11-30 | 艾默生网络能源有限公司 | Power unit of high pressure frequency converter |
| CN103701367A (en) * | 2013-07-11 | 2014-04-02 | 北京航空航天大学 | Soft start control device for sensorless brushless direct current motor |
| CN106232514A (en) * | 2013-12-17 | 2016-12-14 | 株式会社日立制作所 | The control device of elevator and control method thereof |
| JP2016132402A (en) * | 2015-01-21 | 2016-07-25 | トヨタ自動車株式会社 | vehicle |
| CN206940152U (en) * | 2017-07-03 | 2018-01-30 | 蒂森克虏伯电梯（上海）有限公司 | Elevator safety drive system |
| CN108382934A (en) * | 2018-03-23 | 2018-08-10 | 日立电梯（中国）有限公司 | Elevator safety protects control method, apparatus and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8625243B2 (en) | Multi-functional solid state power controller | |
| EP2398146A2 (en) | High power DC SSPC with capability of soft turn-on to large capacitive loads | |
| CN108649550B (en) | Power-down protection control method and device and permanent magnet synchronous motor control system | |
| JP6697181B2 (en) | Electric motor drive | |
| US9571026B2 (en) | Inverter apparatus | |
| CN103743966B (en) | PWM module detection method and system in motor driver | |
| CN112928969A (en) | Early fault detection and mitigation for electric motors | |
| US20170170715A1 (en) | Method of controlling an inverter | |
| CN112715002A (en) | Control device for an inverter, inverter for an asynchronous machine, vehicle and method for operating an inverter | |
| KR101658868B1 (en) | Voltage supply system and method for disabling operation of a dc-dc voltage converter | |
| CN110875707A (en) | Power-down protection control method, device and system for permanent magnet synchronous motor | |
| CN114421427B (en) | Control method, motor controller, storage medium and equipment | |
| CN103683893B (en) | The method for protecting software of off-network inverter start short circuit | |
| CN105553064B (en) | Battery charging device | |
| CN210866051U (en) | Inductive coil driving circuit with protection function | |
| CN210201543U (en) | Charging circuit for improving reliability and photovoltaic air conditioning equipment | |
| CN109742732B (en) | Cut-off type end short circuit protection method of permanent magnet synchronous motor | |
| JP6080364B2 (en) | Voltage clamping method of active rectifier circuit for power loss reduction | |
| CN105656297A (en) | Discharging method of direct driving type wind turbine generator system converter direct-current bus | |
| JP2020080610A (en) | Motor drive system | |
| WO2023026734A1 (en) | Motor drive device, abnormality detection method, and abnormality detection program | |
| JP2014023180A (en) | Control device for inverter | |
| EP4318905A1 (en) | Direct current junction box, photovoltaic power generation system, and fault detection method | |
| KR102569824B1 (en) | Apparatus and method for protecting a vehicle | |
| JP2018057225A (en) | Inverter device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200310 |