CN107942119A - The redundant detecting method of permanent magnet synchronous motor driver bus current - Google Patents
The redundant detecting method of permanent magnet synchronous motor driver bus current Download PDFInfo
- Publication number
- CN107942119A CN107942119A CN201610891881.XA CN201610891881A CN107942119A CN 107942119 A CN107942119 A CN 107942119A CN 201610891881 A CN201610891881 A CN 201610891881A CN 107942119 A CN107942119 A CN 107942119A
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- CN
- China
- Prior art keywords
- permanent magnet
- magnet synchronous
- synchronous motor
- bus current
- motor driver
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- 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.)
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Abstract
The invention discloses a kind of redundant detecting method of permanent magnet synchronous motor driver bus current, output torque order control permanent magnet synchronous motor work of this method first by motor driver according to entire car controller, and record output torque T；Permanent magnet synchronous motor works and detects permanent magnet synchronous motor rotating speed by velocity sensor, permanent magnet synchronous motor speed feedback to motor driver and records motor speed N；Motor driver detects to obtain current busbar voltage V by voltage sensor；Bus current I is calculated by formula.This method increases redundancy detection mechanism to the key parameter of bus current, when bus current sampling circuit occurs abnormal, can obtain corresponding bus current data in time, it is ensured that the reliable control of permanent magnet synchronous motor, prevents security risk.
Description
Technical field
The present invention relates to a kind of redundant detecting method of permanent magnet synchronous motor driver bus current.
Background technology
In control system of electric automobile field, permanent magnet synchronous motor driver needs to examine the size of bus current
Survey, to realize the current monitoring to inputting high voltage power supply and perform corresponding holding function.Bus current size usually all makes
It is detected with bus current sensor, as shown in Figure 1, the output terminal connection permanent magnet synchronous motor 2 of motor driver 1, busbar
Current sensor 3 be serially connected with inlet highway 4 anode or negative terminal and detect signal input motor driver 1, busbar voltage pass
Sensor 5 connects the anode of inlet highway 4 and negative terminal and detects signal input motor driver 1, and phase current sensor 6 is serially connected with
The phase line of permanent magnet synchronous motor 2 and detect signal input motor driver 1, motor speed sensor 7 connect permanent magnet synchronous electric
2 shaft of machine and detect signal input motor driver 1.In the control system of the motor, once bus current sensor fault
Or damage, then the current monitoring failure of high voltage power supply is inputted, the control of permanent magnet synchronous motor exception occurs, seriously affects electronic vapour
Normal, the safety traffic of car, there are some potential safety problems.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of redundancy inspection of permanent magnet synchronous motor driver bus current
Survey method, this method increase redundancy detection mechanism to the key parameter of bus current, when exception occurs in bus current sampling circuit
When, corresponding bus current data can be obtained in time, it is ensured that the reliable control of permanent magnet synchronous motor, prevents security risk.
In order to solve the above technical problems, the redundant detecting method of permanent magnet synchronous motor driver bus current of the present invention includes
Following steps：
Step 1: motor driver works according to the output torque order control permanent magnet synchronous motor of entire car controller, and remember
Record output torque T；
Step 2: permanent magnet synchronous motor, which works and passes through velocity sensor, detects permanent magnet synchronous motor rotating speed, permanent magnet synchronous electric
Machine speed feedback is to motor driver and records motor speed N；
Step 3: motor driver detects to obtain current busbar voltage V by voltage sensor；
Step 4: according to formulaBus current I is obtained, wherein：For system effectiveness.
Since the redundant detecting method of permanent magnet synchronous motor driver bus current of the present invention employs above-mentioned technical proposal, i.e., originally
Output torque order control permanent magnet synchronous motor work of the method first by motor driver according to entire car controller, and record
Output torque T；Permanent magnet synchronous motor works and detects permanent magnet synchronous motor rotating speed, permanent magnet synchronous motor by velocity sensor
Speed feedback is to motor driver and records motor speed N；Motor driver detects to obtain current by voltage sensor
Busbar voltage V；Bus current I is calculated by formula.This method increases redundancy detection machine to the key parameter of bus current
System, when bus current sampling circuit occurs abnormal, can obtain corresponding bus current data in time, it is ensured that permanent magnet synchronous motor
Reliable control, prevent security risk.
Brief description of the drawings
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is control system for permanent-magnet synchronous motor block diagram.
Embodiment
Embodiment is as shown in Figure 1, the redundant detecting method of permanent magnet synchronous motor driver bus current of the present invention is included such as
Lower step：
Step 1: motor driver 1 works according to the output torque order control permanent magnet synchronous motor 2 of entire car controller, and
Record output torque T；
Step 2: permanent magnet synchronous motor 2 works and detects 2 rotating speed of permanent magnet synchronous motor, permanent-magnet synchronous by velocity sensor 7
2 speed feedback of motor is to motor driver 1 and records motor speed N；
Step 3: motor driver 1 obtains current 4 voltage V of busbar by the detection of voltage sensor 5；
Step 4: according to formulaBus current I is obtained, wherein：For system effectiveness.
I is current bus current in this method, and unit is ampere, and direction has positive and negative, corresponds to permanent magnet synchronous motor respectively
Electronic and power generation two states, motoring condition is shown to be the electric current of battery on consumption automobile, and generating state is shown to be to automobile
On battery charging；The current rotating speed N of permanent magnet synchronous motor is detected by velocity sensor, unit is rev/min
（rpm）, have sign symbol, corresponding motor rotates and reverse；The output torque unit of entire car controller order is meters of ox
（N.m）, there is sign symbol；The current busbar voltage unit detected by voltage sensor is volt（V）, and only positive voltage；
System effectivenessValue can be obtained by test, and generally between 0.7~0.9, higher accuracy of detection, can incite somebody to action in order to obtain
The system effectiveness makes an efficiency chart, and table look-at obtains the value in actual use.
This method provides the redundancy detection of permanent magnet synchronous motor driver bus current, once control system median generatrix electric current
Sensor fault or damage, can obtain bus current by this method, avoid the control of permanent magnet synchronous motor from exception occur, it is ensured that
Normal, the safety traffic of electric automobile, prevent the security risk of driving.
Claims (1)
1. a kind of redundant detecting method of permanent magnet synchronous motor driver bus current, it is characterised in that this method includes following step
Suddenly：
Step 1: motor driver works according to the output torque order control permanent magnet synchronous motor of entire car controller, and remember
Record output torque T；
Step 2: permanent magnet synchronous motor, which works and passes through velocity sensor, detects permanent magnet synchronous motor rotating speed, permanent magnet synchronous electric
Machine speed feedback is to motor driver and records motor speed N；
Step 3: motor driver detects to obtain current busbar voltage V by voltage sensor；
Step 4: according to formulaBus current I is obtained, wherein：For system effectiveness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610891881.XA CN107942119A (en) | 2016-10-13 | 2016-10-13 | The redundant detecting method of permanent magnet synchronous motor driver bus current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610891881.XA CN107942119A (en) | 2016-10-13 | 2016-10-13 | The redundant detecting method of permanent magnet synchronous motor driver bus current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107942119A true CN107942119A (en) | 2018-04-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610891881.XA Pending CN107942119A (en) | 2016-10-13 | 2016-10-13 | The redundant detecting method of permanent magnet synchronous motor driver bus current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107942119A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450333A (en) * | 2018-11-19 | 2019-03-08 | 苏州绿控传动科技股份有限公司 | A kind of method of permanent magnet synchronous motor output torque estimation |
| CN113358896A (en) * | 2021-05-25 | 2021-09-07 | 精进电动科技股份有限公司 | Motor rotation speed redundancy detection method and circuit and motor controller |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694493A (en) * | 2011-03-23 | 2012-09-26 | 上海捷能汽车技术有限公司 | Permanent magnet motor torque estimation method in fault model |
-
2016
- 2016-10-13 CN CN201610891881.XA patent/CN107942119A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694493A (en) * | 2011-03-23 | 2012-09-26 | 上海捷能汽车技术有限公司 | Permanent magnet motor torque estimation method in fault model |
Non-Patent Citations (2)
| Title |
|---|
| 宋强 等: "电动汽车电机驱动系统效率测试方法研究", 《微特电机》 * |
| 邱国平: "永磁直流无刷电机实用设计及应用技术", 《上海科学技术出版社》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450333A (en) * | 2018-11-19 | 2019-03-08 | 苏州绿控传动科技股份有限公司 | A kind of method of permanent magnet synchronous motor output torque estimation |
| CN113358896A (en) * | 2021-05-25 | 2021-09-07 | 精进电动科技股份有限公司 | Motor rotation speed redundancy detection method and circuit and motor controller |
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Application publication date: 20180420 |
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| RJ01 | Rejection of invention patent application after publication |