CN117424519A - 电流检测的电机控制系统 - Google Patents
电流检测的电机控制系统 Download PDFInfo
- Publication number
- CN117424519A CN117424519A CN202311665999.7A CN202311665999A CN117424519A CN 117424519 A CN117424519 A CN 117424519A CN 202311665999 A CN202311665999 A CN 202311665999A CN 117424519 A CN117424519 A CN 117424519A
- Authority
- CN
- China
- Prior art keywords
- resistor
- mcu
- amplifier
- sampling
- circuit
- 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
- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 238000005070 sampling Methods 0.000 claims abstract description 38
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
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
- H02P29/027—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an over-current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0854—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load responsive to rate of change of current, couple or speed, e.g. anti-kickback protection
-
- 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
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
-
- 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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
本发明公开了电流检测的电机控制系统,包括:采样电路、RC滤波电路、TVS保护电路和MCU,所述采样电路的一端与被检测的电机连接,采样电路的另一端通过RC滤波电路、TVS保护电路后与MCU相连。RC滤波电路可以实现将高频干扰滤除,避免放大器的输出端输出电压变化过快,而对MCU的检测功能产生影响。电阻R与MCU的内阻实现分压,则实际上MCU的采样电压要比放大器的输出端输出电压小一些,针对这部分,可以在代码层面进行补偿;MCU的管脚输入电压有上限值,使用TVS钳位,避免出现过高电压输入到MCU管脚,造成GPIO损坏。
Description
技术领域
本发明属于电子电路设计技术领域,尤其涉及电流检测的电机控制系统。
背景技术
对于电机控制而言,电流检测电路可以提供重要的反馈信息,将信息与来自主控DSP或MCU的控制信号相结合,可以控制MOSFET或IGBT的栅极驱动芯片并最终实现对电机的控制或调整,另外为了实现过流保护,也很有必要对电流进行监控。
较为常用对于电机电流的检测都是基于采样电阻实现的,通过放大器输出的电压信号至MCU对电机实时监测,通过分析实时数据,实现电机过流保护、堵转保护以及空载自动停机等功能。而放大器输出的电压信号出现电压变化过快导致是会对MCU的检测功能产生影响。
发明内容
本申请针对上述技术问题提出电流检测的电机控制系统,具体技术方案如下:
电流检测的电机控制系统,包括:采样电路、RC滤波电路、TVS保护电路和MCU,所述采样电路的一端与被检测的电机连接,采样电路的另一端通过RC滤波电路、TVS保护电路后与MCU相连。
进一步的,所述采样电路包括采样电阻Rref和电阻R1、电阻R2、电阻R3、电阻R4和放大器,所述采样电阻Rref的一端接电机,另一端接地;所述放大器的正负极分别接在采样电阻Rref的两端,且放大器的正极接在采样电阻Rref的接地端;所述电阻R1串接在采样电阻Rref与放大器的负极之间;所述电阻R2一端接地,另一端接放大器负极;所述电阻R3串接在采样电阻Rref与放大器正极之间;所述电阻R4一端接放大器正极,另一端接放大器的输出端。
进一步的,所述RC滤波电路包括电阻R5和电容C1;所述电阻R5的一端接放大器的输出端,另一端接MCU的输入端;所述电容C1一端接电阻R5与MCU之间,另一端接地;TVS保护电路与电容C1并联。
进一步的,R1=R2=R3=R4。
进一步的,K=R3/R1;
K=100,Rref=0.001ohm;
或K=100,Rref=0.005ohm;
或K=50,Rref=0.005ohm;
或K=50,Rref=0.001ohm。
本发明的有益效果为:本发明中,RC滤波电路可以实现将高频干扰滤除,避免放大器的输出端输出电压变化过快,而对MCU的检测功能产生影响。电阻R与MCU的内阻实现分压,则实际上MCU的采样电压要比放大器的输出端输出电压小一些,针对这部分,可以在代码层面进行补偿;MCU的管脚输入电压有上限值,使用TVS钳位,避免出现过高电压输入到MCU管脚,造成GPIO损坏。
附图说明
图1示出的是电流检测的电机控制系统的电路图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合实施例对本发明技术方案进行清楚、完整地描述。
参见图1,示出的是电流检测的电机控制系统的电路图,该电机控制系统包括采样电路、RC滤波电路、TVS保护电路和MCU,其中采样电路的一端与被检测的电机连接,采样电路的另一端通过RC滤波电路、TVS保护电路后与MCU相连。
采样电路包括采样电阻Rref和电阻R1、电阻R2、电阻R3、电阻R4和放大器。其中,采样电阻Rref的一端接电机,另一端接地;放大器的正负极分别接在采样电阻Rref的两端,且放大器的正极接在采样电阻Rref的接地端;电阻R1串接在采样电阻Rref与放大器的负极之间;电阻R2一端接地,另一端接放大器负极;电阻R3串接在采样电阻Rref与放大器正极之间;电阻R4一端接放大器正极,另一端接放大器的输出端。
RC滤波电路包括电阻R5和电容C1,电阻R5的一端接放大器的输出端,另一端接MCU的输入端,电容C1一端接电阻R5与MCU之间,另一端接地,TVS保护电路与电容C1并联。
上述电路系统中,RC滤波电路可以实现将高频干扰滤除,避免放大器的输出端输出电压变化过快,而对MCU的检测功能产生影响。电阻R与MCU的内阻实现分压,则实际上MCU的采样电压要比放大器的输出端输出电压小一些,针对这部分,可以在代码层面进行补偿。
MCU的管脚输入电压有上限值,使用TVS钳位,避免出现过高电压输入到MCU管脚,造成GPIO损坏。
选型原则:
预设R1=R2=R3=R4;
放大电路的放大倍数等于K=R3/R1;
例如,当MCU的ADC电压达到最大值,这里取3.0v;
取K=100,Rref=0.001ohm,则满载电流最大:Imax=3.0/(100*0.001)=30A;
取K=100,Rref=0.005ohm,则满载电流最大:Imax=3.0/(100*0.005)=6A;
取K=50,Rref=0.005ohm,则满载电流最大:Imax=3.0/(50*0.005)=12A;
取K=50,Rref=0.001ohm,则满载电流最大:Imax=3.0/(50*0.001)=60A。
选型的时候,主要考虑满载的电流损耗,选择具体的采样电阻与放大倍数组合。
以上实施例仅用以说明本发明的技术方案,而非对其限制。
Claims (5)
1.电流检测的电机控制系统,其特征在于,包括:采样电路、RC滤波电路、TVS保护电路和MCU,所述采样电路的一端与被检测的电机连接,采样电路的另一端通过RC滤波电路、TVS保护电路后与MCU相连。
2.根据权利要求1所述的电流检测的电机控制系统,其特征在于,所述采样电路包括采样电阻Rref和电阻R1、电阻R2、电阻R3、电阻R4和放大器,所述采样电阻Rref的一端接电机,另一端接地;所述放大器的正负极分别接在采样电阻Rref的两端,且放大器的正极接在采样电阻Rref的接地端;所述电阻R1串接在采样电阻Rref与放大器的负极之间;所述电阻R2一端接地,另一端接放大器负极;所述电阻R3串接在采样电阻Rref与放大器正极之间;所述电阻R4一端接放大器正极,另一端接放大器的输出端。
3.根据权利要求1所述的电流检测的电机控制系统,其特征在于,所述RC滤波电路包括电阻R5和电容C1;所述电阻R5的一端接放大器的输出端,另一端接MCU的输入端;所述电容C1一端接电阻R5与MCU之间,另一端接地;TVS保护电路与电容C1并联。
4.根据权利要求1所述的电流检测的电机控制系统,其特征在于,R1=R2=R3=R4。
5.根据权利要求1所述的电流检测的电机控制系统,其特征在于,K=R3/R1;
K=100,Rref=0.001ohm;
或K=100,Rref=0.005ohm;
或K=50,Rref=0.005ohm;
或K=50,Rref=0.001ohm。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202311665999.7A CN117424519A (zh) | 2023-12-06 | 2023-12-06 | 电流检测的电机控制系统 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202311665999.7A CN117424519A (zh) | 2023-12-06 | 2023-12-06 | 电流检测的电机控制系统 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN117424519A true CN117424519A (zh) | 2024-01-19 |
Family
ID=89530444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202311665999.7A Pending CN117424519A (zh) | 2023-12-06 | 2023-12-06 | 电流检测的电机控制系统 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN117424519A (zh) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN202103407U (zh) * | 2011-06-09 | 2012-01-04 | 美的集团有限公司 | 直流有刷电机的过流保护电路 |
CN207114731U (zh) * | 2016-11-15 | 2018-03-16 | 惠州市蓝微新源技术有限公司 | 一种bms电流检测及过流保护电路 |
CN111224378A (zh) * | 2018-11-27 | 2020-06-02 | 奥克斯空调股份有限公司 | 一种直流电机采样过流保护电路 |
CN116231606A (zh) * | 2022-12-09 | 2023-06-06 | 超聚变数字技术有限公司 | 采样电路和电路控制方法 |
CN219739953U (zh) * | 2023-05-25 | 2023-09-22 | 深圳硅山技术有限公司 | 一种三相电机大电流保护电路 |
-
2023
- 2023-12-06 CN CN202311665999.7A patent/CN117424519A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN202103407U (zh) * | 2011-06-09 | 2012-01-04 | 美的集团有限公司 | 直流有刷电机的过流保护电路 |
CN207114731U (zh) * | 2016-11-15 | 2018-03-16 | 惠州市蓝微新源技术有限公司 | 一种bms电流检测及过流保护电路 |
CN111224378A (zh) * | 2018-11-27 | 2020-06-02 | 奥克斯空调股份有限公司 | 一种直流电机采样过流保护电路 |
CN116231606A (zh) * | 2022-12-09 | 2023-06-06 | 超聚变数字技术有限公司 | 采样电路和电路控制方法 |
CN219739953U (zh) * | 2023-05-25 | 2023-09-22 | 深圳硅山技术有限公司 | 一种三相电机大电流保护电路 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104297657B (zh) | 数字化大功率微波二极管反向动态波形及损耗功率测试系统 | |
CN108768380B (zh) | 一种传感器的调理电路 | |
CN203026904U (zh) | 过流保护电路及具有该过流保护电路的pfc控制电路 | |
CN100592237C (zh) | 智能开关电源功率检测及控制装置 | |
WO2024007555A1 (zh) | 一种应用于隔离变换器的励磁电流无损采样电路 | |
CN206041466U (zh) | 一种带过温保护的开关电源电路 | |
CN111799989B (zh) | 一种应用于电流模式COT控制Buck变换器的过流检测电路 | |
CN116338292A (zh) | 电流检测电路和电子设备 | |
CN117424519A (zh) | 电流检测的电机控制系统 | |
CN204928079U (zh) | 过流保护电路、功率因数校正电路和变频空调器 | |
CN210166432U (zh) | 低压低频小信号电流检测电路 | |
CN201185392Y (zh) | 具有保护功能的精密跟随隔离电源 | |
CN208589977U (zh) | 一种传感器的调理电路 | |
CN208479168U (zh) | 一种欠压保护电路 | |
CN209282824U (zh) | 一种基于温度的输入欠压保护控制电路 | |
CN112485494A (zh) | 一种基于三极管的电流检测电路 | |
CN102109582A (zh) | 线性电压产生装置 | |
CN108757189A (zh) | 柴油机油门位置的信号放大电路 | |
CN215528597U (zh) | 一种控制电路 | |
CN215986295U (zh) | 一种信号拾取检测电路 | |
CN100352121C (zh) | 一种电源短路保护装置 | |
CN218727581U (zh) | 一种电流采样电路 | |
CN220508268U (zh) | 温度采样电路及温度传感器 | |
CN219496547U (zh) | 一种电机驱动电路的故障检测电路 | |
CN209897011U (zh) | 功放器进行短路保护测试时的功放器输出直流监控电路 |
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 |