CN103944485A - Protection method for over-temperature of permanent magnet motor in pure electric vehicle - Google Patents

Protection method for over-temperature of permanent magnet motor in pure electric vehicle Download PDF

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CN103944485A
CN103944485A CN201310713112.7A CN201310713112A CN103944485A CN 103944485 A CN103944485 A CN 103944485A CN 201310713112 A CN201310713112 A CN 201310713112A CN 103944485 A CN103944485 A CN 103944485A
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permanent magnet
magnet motor
temperature
motor
control system
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CN201310713112.7A
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Chinese (zh)
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徐兵兵
张玉柱
徐性怡
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上海大郡动力控制技术有限公司
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Priority to CN201310713112.7A priority Critical patent/CN103944485A/en
Publication of CN103944485A publication Critical patent/CN103944485A/en

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Abstract

The invention discloses a protection method for over-temperature of a permanent magnet motor in a pure electric vehicle. Temperature of the permanent magnet motor is acquired in real time via a temperature sensor by the method. A control system judges temperature of the permanent magnet motor. When temperature is lower than or equal to 135 DEG C, the permanent magnet motor normally works. When temperature is higher than 135 DEG C, the control system judges the electric and power generation state of operation of the permanent magnet motor. Different motor temperature areas are respectively designated under the electric and power generation state so that power reduction operation, zero power operation and constant power operation are performed by the motor according to different slopes. When temperature of the motor is greater than 152 DEG C, time of duration of the motor is judged. If time of duration is greater than or equal to 20s, the control system generates over-temperature fault alarm of the permanent magnet motor, or the motor performs zero power operation. According to the method, an objective of motor over-temperature protection can be achieved, the requirement for normal electricity utilization of other electricity-utilizing devices in the overall vehicle can also be met so that stable and reliable operation of the vehicle can be guaranteed, and safety hidden trouble of the vehicle can be avoided.

Description

纯电动汽车中永磁电机过温的保护方法 Pure electric vehicle permanent magnet motor over-temperature protection methods

技术领域 FIELD

[0001 ] 本发明涉及一种纯电动汽车中永磁电机过温的保护方法。 [0001] The present invention relates to a pure electric vehicle permanent magnet motor overtemperature protection method.

背景技术 Background technique

[0002] 纯电动汽车中,永磁电机通过控制系统实现发电状态和电动状态的控制和切换,对纯电动汽车而言,其运行环境相对较为复杂的,当纯电动汽车在高温环境下长期运行时,经常会引起电机过温故障;目前在电机控制系统中,一般都对永磁电机的温度进行实时监测,并具有一定的电机过温保护,但仅考虑了如何防止电机过温,而并未考虑到整车上其他用电设备的用电需求,因此具有一定的片面性。 [0002] In pure electric vehicles, by the permanent magnet motor and the switching control system for controlling the electric power generation state and the state of pure electric vehicles, the operating environment which is relatively complicated, when pure electric vehicles run long under high temperature environment when often cause motor over-temperature fault; the current in the motor control system, in general, the temperature of the permanent magnet motor real-time monitoring, and has a certain motor overtemperature protection, but only to consider how to prevent motor over-temperature, and while not take into account the needs of other electrical equipment electricity on the vehicle, thus having a certain one-sidedness. 但作为电机控制系统而言,需满足整车系统的工作要求,传统电机过温保护方法在电机处于发电状态时,为了保证电机不会过温,通常采取电机限功率运行,但同时会导致发电量不足,进而使得整车上的其他用电设备不能正常运行,限制了永磁电机在纯电动汽车上的应用,影响车辆的稳定可靠运行,且存在一定的安全隐患。 But as in terms of motor control system, the vehicle must meet the system requirements for the work, the traditional motor overtemperature protection method when the motor is in power state, in order to ensure that the motor will not over-temperature, usually take the motor running power limit, but will also lead to generation an insufficient amount, thereby making other electrical equipment on the vehicle can not operate normally, limit the application of permanent magnet motors in electric vehicles, the impact of stable and reliable operation of the vehicle, and there are some security risks.

发明内容 SUMMARY

[0003] 本发明所要解决的技术问题是提供一种纯电动汽车中永磁电机过温的保护方法,本方法既能达到永磁电机过温保护的目的,又能满足整车上其它用电设备正常用电的需求,从而保证车辆的稳定可靠运行,避免车辆的安全隐患。 [0003] The present invention solves the technical problem is to provide a permanent magnet electric motor car overtemperature protection method, the method can achieve the objective of the permanent magnet motor over-temperature protection, but also to meet the other electric vehicle equipment normal electricity demand, thus ensuring stable and reliable operation of the vehicle, the vehicle to avoid security risks.

[0004] 为解决上述技术问题,本发明纯电动汽车中永磁电机过温的保护方法包括如下步骤: [0004] In order to solve the above problems, the present invention in pure electric vehicle permanent magnet motor over-temperature protection method comprising the steps of:

步骤一、通过温度传感器实时采集永磁电机温度,控制系统对永磁电机温度进行判别,当温度小于等于135°C时,永磁电机正常运行,当温度大于135°C时,控制系统对永磁电机运行状态进行判别; A step, real-time acquisition by the temperature sensor temperature permanent magnet motor, permanent magnet motor temperature control system for determining, when the temperature is less than equal to 135 ° C, the normal operation of the permanent magnet motor, when the temperature is greater than 135 ° C, the control system of permanent magneto operation status determination;

步骤二、如永磁电机处于电动状态时,当永磁电机温度在135〜144°C区域内,控制系统使永磁电机按照斜率为-1/5降功率运行;当永磁电机温度在144〜148°C区域内,控制系统使永磁电机按照斜率为-1/15降功率运行;当永磁电机温度在148〜152°C区域内,控制系统使永磁电机按照零功率运行;当永磁电机温度大于152°C,判断永磁电机在大于152°C下的持续时间,持续时间小于20s,永磁电机按照零功率运行,若持续时间大于等于20s,则控制系统给出永磁电机过温故障报警; Step two, permanent magnet electric motor in a state, when the permanent magnet motor temperature 135~144 ° C in the region, the permanent magnet motor control system in accordance with a slope of -1/5 power down operation; permanent magnet motor when the temperature is 144 within the region ~148 ° C, the permanent magnet motor control system according to slope -1/15 reduced power operation; permanent magnet motor when the temperature in the region of 148~152 ° C, the permanent magnet motor control system according to zero-power operation; when permanent magnet motor temperature greater than 152 ° C, in the permanent magnet motor is determined duration of greater than 152 ° C, the duration is less than 20s, the permanent magnet motor in accordance with a zero-power operation, if the duration is greater than equal to 20s, the control system is given a permanent motor overtemperature fault alarm;

步骤三、如永磁电机处于发电状态时,当永磁电机温度在135〜140°C区域内,控制系统使永磁电机按照斜率为-1/17.5降功率运行;当永磁电机温度在140〜146°C区域内,控制系统使永磁电机按照3Kw恒功率运行;当永磁电机温度在146〜152°C区域内,控制系统使永磁电机按照零功率运行;当永磁电机温度大于152°C,判断永磁电机在大于152°C下的持续时间,持续时间小于20s,永磁电机按照零功率运行,若持续时间大于等于20s,则控制系统给出永磁电机过温故障报警。 Step three, as in the power generation state when the permanent magnet motor, permanent magnet motor when the temperature in the region of 135~140 ° C, the permanent magnet motor control system in accordance with a slope of -1 power running / lowering 17.5; permanent magnet motor when the temperature is 140 within the region ~146 ° C, the control system of the permanent magnet motor according 3Kw constant power operation; permanent magnet motor when the temperature in the region of 146~152 ° C, the permanent magnet motor control system according to zero-power operation; permanent magnet motor when the temperature is greater than 152 ° C, the duration is determined in the permanent magnet motor is greater than 152 ° C, the duration is less than 20s, the permanent magnet motor in accordance with a zero-power operation, if the duration is greater than equal to 20s, the control system is given a permanent magnet motor overtemperature fault alarm .

由于本发明纯电动汽车中永磁电机过温的保护方法采用了上述技术方案,即本方法通过温度传感器实时采集永磁电机温度,控制系统对永磁电机温度进行判别,当温度小于等于135°C时,永磁电机正常运行,当温度大于135°C时,控制系统对永磁电机运行的电动和发电状态进行判别;在电动和发电状态下分别划定不同的电机温度区域,使电机按不同斜率进行降功率运行、零功率运行以及恒功率运行,当电机温度大于152°C时判断电机持续时间,若持续时间大于等于20s,控制系统给出永磁电机过温故障报警,否则电机按照零功率运行。 Since the electric vehicle according to the present invention, the permanent magnet motor over-temperature protection method using the above technical solution, i.e., real-time acquisition method of the present permanent magnet motor temperature by a temperature sensor, a temperature control system for permanent magnet motors for determining, when the temperature is less than or equal 135 ° C, the normal operation of the permanent magnet motor, when the temperature is greater than 135 ° C, and the control system of the electric power generation state of the permanent magnet motor is running is determined; and the power generation state in the electric motor are delineated different temperature zones, according to the motor different slopes for reduced power operation, a zero-power operation, and constant power operation, determines the duration of the motor when the motor temperature exceeds 152 ° C, if the duration is greater than equal to 20s, the control system is given a permanent magnet motor overtemperature fault alarm, otherwise the motor in accordance with the zero-power operation. 本方法既能达到永磁电机过温保护的目的,又能满足整车上其它用电设备正常用电的需求,从而保证车辆的稳定可靠运行,避免车辆的安全隐患。 This method can achieve the objective of the permanent magnet motor over-temperature protection, but also to meet the other vehicle normal power demand electrical equipment, so as to ensure stable and reliable operation of the vehicle, the vehicle to avoid safety problems.

附图说明 BRIEF DESCRIPTION

[0005] 下面结合附图和实施方式对本发明作进一步的详细说明: [0005] The present invention will be described in further detail in conjunction with the accompanying drawings and embodiments:

图1为本发明纯电动汽车中永磁电机过温的保护方法的流程框图。 Figure 1 is a flow diagram of a permanent magnet motor over-temperature protection method of the invention as a pure electric vehicle.

具体实施方式 Detailed ways

[0006] 如图1所示,本发明纯电动汽车中永磁电机过温的保护方法包括如下步骤: 步骤一、通过温度传感器实时采集永磁电机温度,控制系统对永磁电机温度进行判别, [0006] As shown in FIG. 1, the present invention is a pure electric vehicle permanent magnet motor over-temperature protection method comprising the following steps: a step, by the temperature sensor to collect real-time temperature permanent magnet motor, permanent magnet motor temperature control system for determining,

当温度小于等于135°C时,永磁电机正常运行,当温度大于135°C时,控制系统对永磁电机运行状态进行判别; When the temperature is less than equal to 135 ° C, the normal operation of the permanent magnet motor, when the temperature is greater than 135 ° C, the control system of the permanent magnet motor running discriminated;

步骤二、如永磁电机处于电动状态时,当永磁电机温度在135〜144°C区域内,控制系统使永磁电机按照斜率为-1/5降功率运行;当永磁电机温度在144〜148°C区域内,控制系统使永磁电机按照斜率为-1/15降功率运行;当永磁电机温度在148〜152°C区域内,控制系统使永磁电机按照零功率运行;当永磁电机温度大于152°C,判断永磁电机在大于152°C下的持续时间,持续时间小于20s,永磁电机按照零功率运行,若持续时间大于等于20s,则控制系统给出永磁电机过温故障报警; Step two, permanent magnet electric motor in a state, when the permanent magnet motor temperature 135~144 ° C in the region, the permanent magnet motor control system in accordance with a slope of -1/5 power down operation; permanent magnet motor when the temperature is 144 within the region ~148 ° C, the permanent magnet motor control system according to slope -1/15 reduced power operation; permanent magnet motor when the temperature in the region of 148~152 ° C, the permanent magnet motor control system according to zero-power operation; when permanent magnet motor temperature greater than 152 ° C, in the permanent magnet motor is determined duration of greater than 152 ° C, the duration is less than 20s, the permanent magnet motor in accordance with a zero-power operation, if the duration is greater than equal to 20s, the control system is given a permanent motor overtemperature fault alarm;

步骤三、如永磁电机处于发电状态时,当永磁电机温度在135〜140°C区域内,控制系统使永磁电机按照斜率为-1/17.5降功率运行;当永磁电机温度在140〜146°C区域内,控制系统使永磁电机按照3Kw恒功率运行;当永磁电机温度在146〜152°C区域内,控制系统使永磁电机按照零功率运行;当永磁电机温度大于152°C,判断永磁电机在大于152°C下的持续时间,持续时间小于20s,永磁电机按照零功率运行,若持续时间大于等于20s,则控制系统给出永磁电机过温故障报警。 Step three, as in the power generation state when the permanent magnet motor, permanent magnet motor when the temperature in the region of 135~140 ° C, the permanent magnet motor control system in accordance with a slope of -1 power running / lowering 17.5; permanent magnet motor when the temperature is 140 within the region ~146 ° C, the control system of the permanent magnet motor according 3Kw constant power operation; permanent magnet motor when the temperature in the region of 146~152 ° C, the permanent magnet motor control system according to zero-power operation; permanent magnet motor when the temperature is greater than 152 ° C, the duration is determined in the permanent magnet motor is greater than 152 ° C, the duration is less than 20s, the permanent magnet motor in accordance with a zero-power operation, if the duration is greater than equal to 20s, the control system is given a permanent magnet motor overtemperature fault alarm .

[0007] 在现有技术中,对电机温度的过温保护通常都是不分运行状态,即电动和发电状态是按照同一条曲线来降功率运行,但对于纯电动车中使用的永磁电机而言,这往往不能满足整车上复杂的环境,当电机处于发电状态时,按照一条曲线来降功率是不能满足整车系统要求的,所以本发明就是采用折线化的方法,折线化曲线的斜率值及温度点的选取是根据整车上其他用电设备的最大功率、永磁电机本身的温升数据及最恶劣环境下的电机数据。 [0007] In the prior art, over-temperature protection for motor temperature are usually operating state regardless, i.e., motoring and generating a curve in accordance with the reduced power operation, but for permanent magnet motors used in electric vehicles , this complex environment often can not meet the vehicle, when the motor is in the power generation state, according to a curve can not meet the reduced power requirements of the vehicle system, the present invention is the use of the method of the polyline, the polyline curve selected slope value and the motor data point is the temperature at the maximum power of the other electrical equipment on the vehicle, the permanent magnet motor itself and temperature data according to the harshest environments. 根据本方法永磁电机温度达到152°C后需要持续20s后再报过温故障,依据是通过对永磁电机的折线化降功率运行,永磁电机温度一般不会达到152°C,即使达到,持续时间也不会超过20s,电机温度就会慢慢降下来,因此达到了永磁电机过温保护的目的。 The permanent magnet motor of the method after the temperature reached 152 ° C for 20s and then packets need overtemperature fault, based on operation by a fold of the reduced power of the permanent magnet motor, permanent magnet motor temperature generally does not reach 152 ° C, to achieve even the duration will not exceed 20s, the motor temperature will slowly come down, so to achieve the purpose of permanent magnet motor over-temperature protection.

[0008] 本方法通过永磁电机台架试验表明永磁电机在电动和发电状态下均能满足纯电动汽车运行的要求,并通过整车验证,车辆怠速起停功能、急加急减速功能等均满足车辆实际行驶的要求,在达到永磁电机过温保护目的的同时,保证了整车上其它用电设备正常用电的需求,从而确保车辆的稳定可靠运行,避免车辆的安全隐患。 [0008] The permanent magnet motor according to the present method showed bench and permanent magnet motor in an electric power generation state can meet the requirements of the electric car is running, and verified by the vehicle, the vehicle from the idling stop function, acute deceleration function expedited meet the requirements of the vehicle is actually traveling in over-temperature protection purposes while achieving permanent magnet motor, to ensure that the electrical equipment on the vehicle other normal power needs, so as to ensure stable and reliable operation of the vehicle, the vehicle to avoid security risks.

Claims (1)

1.一种纯电动汽车中永磁电机过温的保护方法,其特征在于本方法包括如下步骤:步骤一、通过温度传感器实时采集永磁电机温度,控制系统对永磁电机温度进行判别,当温度小于等于135°c时,永磁电机正常运行,当温度大于135°c时,控制系统对永磁电机运行状态进行判别; 步骤二、如永磁电机处于电动状态时,当永磁电机温度在135〜144°C区域内,控制系统使永磁电机按照斜率为-1/5降功率运行;当永磁电机温度在144〜148°C区域内,控制系统使永磁电机按照斜率为-1/15降功率运行;当永磁电机温度在148〜152°C区域内,控制系统使永磁电机按照零功率运行;当永磁电机温度大于152°C,判断永磁电机在大于152°C下的持续时间,持续时间小于20s,永磁电机按照零功率运行,若持续时间大于等于20s,则控制系统给出永磁电机过温故障报警; 步骤三、如永磁电机处 An electric vehicle in the permanent magnet motor overtemperature protection method, characterized in that the method comprises the following steps: a step, by the temperature sensor to collect real-time temperature permanent magnet motor, permanent magnet motor temperature control system for determining, when when the temperature is less than equal to 135 ° c, the normal operation of the permanent magnet motor, when the temperature is greater than 135 ° c, the control system of the permanent magnet motor running discriminated; two step, such as a permanent magnet motor when the motor is in the state, when the permanent magnet motor temperature 135~144 ° C in the region, the control system for the operation of the permanent magnet motor according to the -1/5 power down slope; permanent magnet motor when the temperature in the region of 144~148 ° C, the permanent magnet motor control system according to slope - 1/15 reduced power operation; permanent magnet motor when the temperature in the region of 148~152 ° C, the permanent magnet motor control system according to zero-power operation; permanent magnet motor when the temperature is higher than 152 ° C, in the permanent magnet motor is determined greater than 152 ° time duration for case C, the duration is less than 20s, permanent magnet motor in accordance with the zero-power operation, if the duration is greater than equal to 20s, the control system is given a permanent magnet motor overtemperature fault alarm; step three, the permanent magnet motor 于发电状态时,当永磁电机温度在135〜140°C区域内,控制系统使永磁电机按照斜率为-1/17.5降功率运行;当永磁电机温度在140〜146°C区域内,控制系统使永磁电机按照3Kw恒功率运行;当永磁电机温度在146〜152°C区域内,控制系统使永磁电机按照零功率运行;当永磁电机温度大于152°C,判断永磁电机在大于152°C下的持续时间,持续时间小于20s,永磁电机按照零功率运行,若持续时间大于等于20s,则控制系统给出永磁电机过温故障报警。 When the power generation state, when the permanent magnet motor temperature 135~140 ° C in the region, the permanent magnet motor control system in accordance with a slope of -1 power running / lowering 17.5; permanent magnet motor when the temperature in the region of 140~146 ° C, the control system according to the permanent magnet motor running 3Kw constant power; permanent magnet motor when the temperature in the region of 146~152 ° C, the permanent magnet motor control system according to zero-power operation; permanent magnet motor when the temperature is higher than 152 ° C, the permanent magnet is determined the duration of the motor is greater than 152 ° C, the duration is less than 20s, the permanent magnet motor in accordance with a zero-power operation, if the duration is greater than equal to 20s, the control system is given a permanent magnet motor overtemperature fault alarm.
CN201310713112.7A 2013-12-23 2013-12-23 Protection method for over-temperature of permanent magnet motor in pure electric vehicle CN103944485A (en)

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CN105207569A (en) * 2015-10-26 2015-12-30 重庆长安汽车股份有限公司 Over-temperature protection method and device for motor of electric vehicle and electric vehicle
CN106208845A (en) * 2016-07-11 2016-12-07 广东美的暖通设备有限公司 The control method of direct current generator and control device and breeze fan
CN106374682A (en) * 2016-09-30 2017-02-01 安徽江淮汽车股份有限公司 Cooling method and system of hybrid power motor

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