WO2018214461A1 - 一种无刷电机的测试系统及其测试方法 - Google Patents

一种无刷电机的测试系统及其测试方法 Download PDF

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Publication number
WO2018214461A1
WO2018214461A1 PCT/CN2017/114426 CN2017114426W WO2018214461A1 WO 2018214461 A1 WO2018214461 A1 WO 2018214461A1 CN 2017114426 W CN2017114426 W CN 2017114426W WO 2018214461 A1 WO2018214461 A1 WO 2018214461A1
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Prior art keywords
speed
motor
test system
module
brushless motor
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PCT/CN2017/114426
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English (en)
French (fr)
Inventor
刘元江
令通
刘鹏
李全海
龙松林
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Goertek Inc
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Goertek Inc
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Publication of WO2018214461A1 publication Critical patent/WO2018214461A1/zh
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34Testing dynamo-electric machines
    • G01R31/343Testing dynamo-electric machines in operation

Definitions

  • the invention relates to the technical field of brushless motor testing, and more particularly to a test system for a brushless motor and a test method thereof.
  • a test system for a brushless motor includes a control module, an electronic governor, a rotational speed detecting module, and a motor interface for connecting a brushless motor to be tested, the control module being Set to output a motor speed control signal to the electronic governor; the electronic governor is configured to output a three-phase motor control signal to the motor interface according to the motor speed control signal, the three-phase motor control signal And driving the brushless motor to be tested to rotate according to a target speed corresponding to a duty ratio of the motor speed control signal; the speed detecting module is configured to detect an actual speed of the brushless motor to be tested, and The actual rotational speed is sent to the control module; the control module is configured to detect whether a difference between the actual rotational speed and the target rotational speed is super Out of the preset range.
  • the test system further includes an alarm module, the control module is configured to control the alarm module to issue an alarm when a difference between the actual speed and the target speed exceeds the preset range .
  • the alarm module is a buzzer or a light emitting diode.
  • the test system further includes an input module, the input module is configured to receive a control command input by the user, and the control module outputs a corresponding motor speed control signal according to the control command; and/or The input module is configured to receive a control parameter input by a user, and the control module outputs a corresponding motor speed control signal according to the control parameter.
  • the test system further includes a display module, the display module being configured to display the actual rotational speed.
  • the input module and the display module are provided by a host computer.
  • the test system further includes a storage module configured to store a correspondence between a model of the brushless motor, a target rotational speed of the brushless motor, and a duty ratio of the motor speed control signal.
  • the rotation speed detecting module is provided by a photoelectric sensor.
  • the test system further includes a power module configured to supply power to the test system.
  • control module is provided by a processor chip.
  • test method for a test system comprising:
  • An advantageous effect of the present invention is that, by the test system of the present invention, it can be detected whether the actual rotational speed of the brushless motor to be tested matches the target rotational speed corresponding to the motor speed control signal output by the control module, that is, the actual rotational speed of the brushless motor to be tested. Whether the difference between the target speed and the target speed exceeds a preset range to detect the reliability of the brushless motor to be tested.
  • the test system can also detect the average failure time and service life of the brushless motor to be tested.
  • FIG. 1 is a block schematic diagram of an embodiment of a test system for a brushless motor in accordance with the present invention
  • FIG. 2 is a block schematic diagram of another embodiment of a test system for a brushless motor in accordance with the present invention.
  • FIG. 3 is a flow chart of one embodiment of a test method of a test system in accordance with the present invention.
  • FIG. 4 is a flow chart of another embodiment of a test method for a test system in accordance with the present invention.
  • U2-electronic governor U3-speed detection module
  • U4-alarm module U5-input module
  • U6-display module U7-storage module
  • the test system of the brushless motor of the drone comprises a control module U1, an electronic governor U2, a rotation speed detecting module U3, and a motor interface J1 for connecting the brushless motor to be tested.
  • the control module U1 is arranged to output a motor speed control signal to the electronic governor U2; the electronic governor U2 is arranged to output a three-phase motor control signal to the motor interface J1 according to the motor speed control signal, and the three-phase motor control signal is used for driving
  • the brushless motor to be tested rotates according to the target speed corresponding to the duty ratio of the motor speed control signal.
  • the target rotational speed is a set desired value, and the actual rotational speed of the brushless motor may not be equal to the target rotational speed.
  • the rotation speed detecting module U3 is arranged to detect the actual rotation speed of the brushless motor to be tested, and send the actual rotation speed to the control module U1, and the control module U1 is further arranged to detect whether the actual rotation speed exceeds the preset range.
  • the speed detecting module U3 may detect the actual rotating speed of the brushless motor to be tested in real time, and send the actual speed to the control module U1 in real time, or may detect the actual rotating speed of the brushless motor to be tested, for example, 1s. It is sent to the control module U1 when the actual speed is detected.
  • the motor interface J1 can be a three-phase interface, and is connected with the brushless motor to be tested through U, V, W three-phase motor control lines.
  • the motor speed control signal period is constant
  • the high level time is adjustable in each period
  • the target speed of the brushless motor to be tested is controlled by changing the high level time in each period, that is, adjusting the positive duty ratio
  • each The duty cycle represents a target speed value. Therefore, the target speed of the brushless motor to be tested can be determined according to the duty ratio of the motor speed control signal.
  • the preset range may specifically be a range of the rotational speed error, and the preset range may be, for example but not limited to, 20 rpm.
  • the actual speed and control of the brushless motor can be detected by the test system of the present invention.
  • the test system can also detect the average failure time and service life of the brushless motor to be tested.
  • the control module U1 can also stop outputting the motor speed control signal to the electronic governor U2 when detecting that the target speed of the brushless motor to be tested exceeds the preset range, so that the brushless motor to be tested stops rotating, and the brushless test is stopped. The motor is tested.
  • the control module U1 may be provided by a processor chip, which may for example be an MCU.
  • the test system can also be used to simulate the control of the brushless motor by the drone.
  • the motor speed control signal output by the control module U1 can increase the speed of the motor from 0 rpm to the first target speed within a set acceleration time, for example, but not limited to 8000 rpm, and start to simulate the brushless motor under the operating state of the drone.
  • the control can last for a period of time, for example, but not limited to 25 minutes; the motor speed control signal can also make the target speed of the motor return to 0 rpm within the set deceleration time, and start to simulate the rotation of the brushless motor in the non-operating state of the drone.
  • the situation, and for a period of time for example, can be, but is not limited to, 25 minutes.
  • the motor speed control signal may cause the motor speed to maintain the first target speed, for example, but not limited to, 8000 rpm, and for a period of time, for example, but not limited to 5 s, to simulate the drone hover state.
  • the rotation condition of the lower brushless motor; the motor speed control signal causes the motor speed to maintain the second target speed, for example, but not limited to, 10,000 rpm, and lasts for a period of time, for example, but not limited to 5 s, to simulate the drone acceleration state.
  • the rotation of the brush motor may cause the motor speed to maintain the first target speed, for example, but not limited to, 8000 rpm, and for a period of time, for example, but not limited to 5 s, to simulate the drone hover state.
  • the rotation condition of the lower brushless motor causes the motor speed to maintain the second target speed, for example, but not limited to, 10,000 rpm, and lasts for a period of time, for example, but not limited to 5 s, to simulate the drone acceleration state.
  • the performance of the brushless motor can be tested by simulating the state of the drone during daily flight before production.
  • the R&D personnel can control the corresponding performance parameters of the brushless motor at any time, and let the inspectors strictly control the quality of the brushless motor in the manufacturing stage to improve the quality and performance of the final product.
  • the rotation speed detecting module U3 may be provided by a photoelectric sensor.
  • the test system of the present invention may further include an alarm module U4, which is further configured to control the alarm module U4 to issue an alarm when the difference between the actual speed and the target speed exceeds a preset range.
  • an alarm module U4 which is further configured to control the alarm module U4 to issue an alarm when the difference between the actual speed and the target speed exceeds a preset range.
  • the alarm module U4 can be, for example, a buzzer or a light emitting diode. Specifically, the control module U1 may control the buzzer to sound or control the LED to emit light when the difference between the actual speed and the target speed exceeds a preset range.
  • the test system may further include an input module U5, the input module U5 is configured to receive a control command input by the user, and the control module U1 is configured to output a corresponding motor speed control signal according to the control command; And/or, the input module U5 is configured to receive a control parameter input by the user, and the control module U1 outputs a corresponding motor speed control signal according to the control parameter.
  • the user can input the model of the brushless motor through the input module U5, and the foregoing set acceleration time, set deceleration time, first target rotation speed, duration of the first target rotation speed, second target rotation speed, and second target.
  • the control parameters such as the duration of the rotational speed and the duration of the working state
  • the control module U1 outputs corresponding motor speed control signals according to the control parameters.
  • the user can also input the control command to start the test or stop the test through the input module U5.
  • the control module U1 can output the motor speed control signal after receiving the control command to start the test, and stop the output motor adjustment after receiving the control command to stop the test. Speed signal.
  • the user can also input a control command for controlling the start of the brushless motor and a control command for stopping the test through the input module U5.
  • the control module U1 receives the control command to start the test, it starts to output the motor speed control signal, so that the brushless motor to be tested starts to rotate, and starts testing the brushless motor to be tested;
  • the control module U1 receives the control command to stop the test Stop outputting the motor speed control signal, so that the brushless motor to be tested stops rotating, and the test of the brushless motor to be tested is stopped.
  • test system may further include a display module U6 that is configured to display the actual rotational speed.
  • the actual rotational speed detected by the rotational speed detecting module U3 may not be directly transmitted to the display module U6 for display. Therefore, the control module U1 is required to process the actual rotational speed and then send it to the display module U6 for display.
  • the input module U5 and the display module U6 may be provided by the host computer.
  • the test system may further include a storage module U7, and the storage module U7 is set to store no. The correspondence between the model of the brush motor, the target speed of the brushless motor, and the duty ratio of the motor speed control signal.
  • the test system can be used to test different types of brushless motor prototypes in advance to obtain the duty ratio of the motor speed control signals of different types of brushless motors at different speeds, and then the model of the brushless motor and the brushless motor are The target speed and the duty ratio of the motor speed control signal of the brushless motor at the target speed are stored in a comparison table in the storage module U7, and the comparison table can reflect the model of the brushless motor, the target speed of the brushless motor, and The correspondence between the duty cycles of the motor speed control signals.
  • the brushless motor model input, the first speed and the second speed input by the input module U5 determine the duty ratio of the motor speed control signal when the target speed is the first speed, and the target is the first The duty cycle of the motor speed control signal at the second speed.
  • the memory module U7 may include, for example, a ROM (Read Only Memory), a RAM (Random Access Memory), a nonvolatile memory such as a hard disk, or the like.
  • the storage module U7 and the control module U1 may be provided by the same processor chip.
  • the test system can also include a power module U8 that is configured to power other modules of the test system.
  • the modules in the test system are fixed, so the tester only needs to replace the different types of brushless motors to be tested according to the requirements.
  • the power of different types of brushless motors is different.
  • the power of the electronic governor U2 and the power module U8 can be relatively large.
  • FIG. 3 is a flow chart of an embodiment of a test method of the test system according to the present invention.
  • Step S310 the control test system outputs the first three-phase motor control signal in the first time period to drive the brushless motor to be tested to rotate according to the first target speed.
  • Step S320 detecting whether the difference between the actual rotation speed of the brushless motor to be tested in the first time period and the first target rotation speed is within the first preset range, if yes, executing step S330; if not, executing In step S350, the alarm reminds the tester and ends the test method.
  • Step S310 and step S320 are performed simultaneously, that is, the actual rotational speed of the brushless motor to be tested is detected while the first brushless motor is being rotated.
  • Step S330 the control test system outputs a second three-phase motor control signal during the second time period to drive the brushless motor to be tested to rotate according to the second target speed.
  • Step S340 detecting whether the difference between the actual rotational speed of the brushless motor to be tested in the second time period and the second target rotational speed is within the second preset range, and if yes, proceeding to step S310, repeating the test method
  • Step S330 and step S340 are simultaneously performed, that is, the actual rotational speed of the brushless motor to be tested is detected while the second brushless motor is being rotated.
  • the first preset range and the second preset range may be the same.
  • the first time period and the second time period may be, but are not limited to, 5s
  • the first target speed may be, for example but not limited to, 8000 rpm
  • the second target speed may be, for example but not limited to, 10000 rpm.
  • steps S410 to S430 may be performed.
  • step S410 it is detected whether the test time exceeds the set time. If yes, step S420 is performed, and the test time is cleared to start re-clocking; if not, step S310 is repeatedly performed.
  • the test time specifically refers to the cumulative execution time of step S310 and step S330, and the set time may be, for example, but not limited to, 25 minutes.
  • Step S420 the control test system stops outputting the three-phase control signal during the third time period, so that the brushless motor to be tested stops rotating.
  • the third time period may be, for example but not limited to, 25 minutes.
  • Step S430 detecting whether the actual rotational speed of the brushless motor to be tested is 0 in the third time period, if yes, proceeding to step S310 to repeat the test of the brushless motor to be tested; if not, executing step S350, the alarm Prompt the tester and end the test method.
  • step S420 and step S430 may be performed simultaneously, that is, during the third time period, the actual speed of the brushless motor to be tested is controlled while the rotation of the brushless motor is stopped.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

一种无刷电机的测试系统,包括控制模块(U1)、电子调速器(U2)、转速检测模块(U3)及用于连接待测无刷电机的电机接口(J1),控制模块(U1)被设置为输出电机调速信号至电子调速器(U2);电子调速器(U2)被设置为根据电机调速信号输出三相电机控制信号至电机接口(J1),三相电机控制信号用于驱动待测无刷电机按照与电机调速信号的占空比相对应的目标转速转动;转速检测模块(U3)被设置为检测待测无刷电机的实际转速,并将实际转速发送至控制模块(U1);控制模块(U1)被设置为检测实际转速与目标转速之间的差值是否超出预设范围。测试系统可以检测待测无刷电机的可靠性。

Description

一种无刷电机的测试系统及其测试方法 技术领域
本发明涉及无刷电机测试技术领域,更具体地,本发明涉及一种无刷电机的测试系统及其测试方法。
背景技术
随着近几年无人机行业的快速发展,无人机已经逐渐普及到各个行业。无人机技术不断进步,追求内部结构部件的高稳定性和高性能成了生产厂商的目标,尤其是无人机动力系统,它的安全性、可靠性日益受到消费者的关注。无刷电机作为无人机动力系统的核心功能部件,其对安全性、可靠性要求十分严格。但目前我国针对无人机无刷电机测试检测设备存在一些突出问题,如产品单一化,通用化程度低等,不能满足目前无人机无刷电机的批量生产的要求。在无人机无刷电机批量生产过程中,其产品的可靠性测试检测十分重要,直接关系到产品的质量及用户的高品质体验效果和安全性。
发明内容
本发明的一个目的是提供一种能够测试无刷电机可靠性的测试系统。
根据本发明的第一方面,提供了一种无刷电机的测试系统,包括控制模块、电子调速器、转速检测模块、及用于连接待测无刷电机的电机接口,所述控制模块被设置为输出电机调速信号至所述电子调速器;所述电子调速器被设置为根据所述电机调速信号输出三相电机控制信号至所述电机接口,所述三相电机控制信号用于驱动所述待测无刷电机按照与所述电机调速信号的占空比对应的目标转速转动;所述转速检测模块被设置为检测所述待测无刷电机的实际转速,并将所述实际转速发送至所述控制模块;所述控制模块被设置为检测所述实际转速与所述目标转速之间的差值是否超 出预设范围。
可选的是,所述测试系统还包括报警模块,所述控制模块被设置为在所述实际转速与所述目标转速之间的差值超出所述预设范围时控制所述报警模块发出警报。
可选的是,所述报警模块为蜂鸣器或者发光二极管。
可选的是,所述测试系统还包括输入模块,所述输入模块被设置为接收用户输入的控制指令,所述控制模块根据所述控制指令输出对应的电机调速信号;和/或,所述输入模块被设置为接收用户输入的控制参数,所述控制模块根据所述控制参数输出对应的电机调速信号。
可选的是,所述测试系统还包括显示模块,所述显示模块被设置为显示所述实际转速。
可选的是,所述输入模块和所述显示模块由上位机提供。
可选的是,所述测试系统还包括存储模块,所述存储模块被设置为存储无刷电机的型号、无刷电机的目标转速和电机调速信号的占空比之间的对应关系。
可选的是,所述转速检测模块由一光电传感器提供。
可选的是,所述测试系统还包括电源模块,所述电源模块被设置为向所述测试系统供电。
可选的是,所述控制模块由一处理器芯片提供。
根据本发明的第二方面,提供了一种根据本发明第一方面所述的测试系统的测试方法,包括:
控制所述测试系统在第一时间段内输出第一三相电机控制信号,以驱动所述待测无刷电机按照第一目标转速转动;
检测所述待测无刷电机在所述第一时间段内的实际转速与所述第一目标转速之间的差值是否在第一预设范围内;
控制所述测试系统在第二时间段内输出第二三相电机控制信号,以驱动所述待测无刷电机按照第二目标转速转动;
检测所述待测无刷电机在所述第二时间段内的实际转速与所述第二目标转速之间的差值是否在第二预设范围内。
本发明的一个有益效果在于,通过本发明的测试系统,可以检测待测无刷电机的实际转速与控制模块输出的电机调速信号对应的目标转速是否相符,即待测无刷电机的实际转速与目标转速之间的差值是否超出预设范围,以检测待测无刷电机的可靠性。该测试系统还可以检测待测无刷电机的平均故障时间及使用寿命。
通过以下参照附图对本发明的示例性实施例的详细描述,本发明的其它特征及其优点将会变得清楚。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本发明的实施例,并且连同其说明一起用于解释本发明的原理。
图1为根据本发明无刷电机的测试系统的一种实施例的方框原理图;
图2为根据本发明无刷电机的测试系统的另一种实施例的方框原理图;
图3为根据本发明测试系统的测试方法的一种实施方式的流程图;
图4为根据本发明测试系统的测试方法的另一种实施方式的流程图。
附图标记说明:
J1-电机接口;                 U1-控制模块;
U2-电子调速器;               U3-转速检测模块;
U4-报警模块;                 U5-输入模块;
U6-显示模块;                 U7-存储模块;
U8-电源模块。
具体实施方式
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到:除非另外具体说明,否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的,决不作为对本发明及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨 论,但在适当情况下,所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中,任何具体值应被解释为仅仅是示例性的,而不是作为限制。因此,示例性实施例的其它例子可以具有不同的值。
应注意到:相似的标号和字母在下面的附图中表示类似项,因此,一旦某一项在一个附图中被定义,则在随后的附图中不需要对其进行进一步讨论。
为了解决现有技术中存在的针对无人机无刷电机测试检测设备较为单一、通用化程度低等、不能满足目前无人机无刷电机的批量生产的要求的问题,提供了一种用于无人机的无刷电机的测试系统,如图1所示,包括控制模块U1、电子调速器U2、转速检测模块U3、及用于连接待测无刷电机的电机接口J1。控制模块U1被设置为输出电机调速信号至电子调速器U2;电子调速器U2被设置为根据电机调速信号输出三相电机控制信号至电机接口J1,三相电机控制信号用于驱动待测无刷电机按照与电机调速信号的占空比相对应的目标转速转动。其中,目标转速是一个设定的期望值,无刷电机的实际转速与目标转速可能不相等。转速检测模块U3被设置为检测待测无刷电机的实际转速,并将实际转速发送至控制模块U1,控制模块U1还被设置为检测实际转速是否超出预设范围。其中,转速检测模块U3可以是实时检测待测无刷电机的实际转速,并实时将实际转速发送至控制模块U1,也可以是间隔固定时间例如是1s检测待测无刷电机的实际转速,在检测到实际转速时将其发送至控制模块U1。
电机接口J1可以为三相接口,与待测无刷电机通过U、V、W三相电机控制线对应连接。
其中,电机调速信号周期不变,每个周期内高电平时间可调,通过改变每个周期内高电平时间即调整正占空比来控制待测无刷电机的目标转速,每个占空比代表一个目标转速值。因此,根据电机调速信号的占空比就可以确定待测无刷电机的目标转速。预设范围具体可以是转速误差范围,预设范围例如可以但不限于是20rpm。
这样,通过本发明的测试系统,可以检测无刷电机的实际转速与控制 模块输出的电机调速信号对应的目标转速是否相符,即检测待测无刷电机的实际转速与目标转速之间的误差是否超出预设范围,以检测待测无刷电机的可靠性。该测试系统还可以检测待测无刷电机的平均故障时间及使用寿命。
控制模块U1具体还可以在检测到待测无刷电机的目标转速超出预设范围时停止输出电机调速信号至电子调速器U2,以使得待测无刷电机停止转动,停止对待测无刷电机进行测试。
控制模块U1可以是由一个处理器芯片提供的,该处理器芯片例如可以是MCU。
具体的,该测试系统还可以用于模拟无人机对无刷电机的控制。例如,控制模块U1输出的电机调速信号可以使得电机的转速在设定加速时间内由0rpm提高至第一目标转速例如可以但不局限于是8000rpm,开始模拟无人机工作状态下对无刷电机的控制,并持续一段时间例如可以但不局限于是25min;电机调速信号还可以使得电机的目标转速在设定减速时间内恢复至0rpm,开始模拟无人机非工作状态下无刷电机的转动情况,并持续一段时间例如可以但不局限于是25min。在模拟无人机工作状态下,电机调速信号可以使得电机转速保持第一目标转速例如可以但不局限于是8000rpm、并持续一段时间例如可以但不局限于是5s,以模拟无人机悬停状态下无刷电机的转动情况;电机调速信号再使得电机转速保持第二目标转速例如可以但不局限于是10000rpm、并持续一段时间例如可以但不局限于是5s,以模拟无人机加速状态下无刷电机的转动情况。
这样,通过本发明的测试系统,可以在生产前模拟无人机在日常飞行时的状态来测试无刷电机的性能。在设计阶段让研发人员随时掌控无刷电机的相应性能参数,在生产制造阶段让检测人员严格把控无刷电机的品质,从而来提高最终产品的质量和性能。
具体的,转速检测模块U3可以是由一光电传感器提供。
进一步地,如图2所示,本发明的测试系统还可以包括报警模块U4,控制模块U1还被设置为在实际转速与目标转速之间的差值超出预设范围时控制报警模块U4发出警报,以提示测试人员。便于测试人员及时处理异 常情况。
报警模块U4例如可以是蜂鸣器或者发光二极管。具体的,控制模块U1可以是在实际转速与目标转速之间的差值超出预设范围时,控制蜂鸣器发声或者控制发光二极管发光。
在本发明的一个具体实施例中,该测试系统还可以包括输入模块U5,输入模块U5被设置为接收用户输入的控制指令,控制模块U1被设置为根据控制指令输出对应的电机调速信号;和/或,输入模块U5被设置为接收用户输入的控制参数,控制模块U1根据控制参数输出对应的电机调速信号。
具体的,用户可以通过输入模块U5输入无刷电机的型号、及前述的设定加速时间、设定减速时间、第一目标转速、第一目标转速的持续时间、第二目标转速、第二目标转速的持续时间和工作状态持续时间等控制参数,控制模块U1再根据这些控制参数输出对应的电机调速信号。用户还可以通过输入模块U5输入开始测试或者是停止测试的控制指令,控制模块U1可以在接收到开始测试的控制指令后输出电机调速信号,在接收到停止测试的控制指令后停止输出电机调速信号。
用户还可以通过输入模块U5输入用于控制无刷电机开始测试的控制指令和停止测试的控制指令。控制模块U1接收到开始测试的控制指令时,开始输出电机调速信号,使得待测无刷电机开始转动,开始对该待测无刷电机进行测试;控制模块U1接收到停止测试的控制指令时,停止输出电机调速信号,使得待测无刷电机停止转动,停止对该待测无刷电机进行测试。
进一步地,该测试系统还可以包括显示模块U6,显示模块U6被设置为显示实际转速。此时,转速检测模块U3检测到的实际转速可能会无法直接传送至显示模块U6进行显示,因此,需要控制模块U1对实际转速进行处理之后发送至显示模块U6进行显示。
在此基础上,输入模块U5和显示模块U6可以是由上位机提供的。
由于有该测试系统使用的电子调速器是固定不变的,但待测无刷电机的型号会不同,因此,可能会出现电机调速信号的占空比相同、而不同型号的待测无刷电机的转速不同的情况。为了避免这种情况的发生,如图2所示,该测试系统还可以包括存储模块U7,存储模块U7被设置为存储无 刷电机的型号、无刷电机的目标转速和电机调速信号的占空比之间的对应关系。
具体的,可以是预先通过该测试系统测试不同型号的无刷电机样机来获取不同型号无刷电机不同转速下的电机调速信号的占空比,然后将无刷电机的型号、无刷电机的目标转速、和无刷电机在该目标转速下电机调速信号的占空比对应存储在存储模块U7中的对照表中,该对照表可以反映无刷电机的型号、无刷电机的目标转速和电机调速信号的占空比之间的对应关系。这样,当测试人员开始测试时,通过输入模块U5输入的无刷电机型号、第一转速和第二转速,确定当目标转速为第一转速时电机调速信号的占空比、及目标为第二转速时电机调速信号的占空比。
该存储模块U7例如可以包括ROM(只读存储器)、RAM(随机存取存储器)、诸如硬盘的非易失性存储器等。存储模块U7和控制模块U1可是由同一处理器芯片提供的。
在如图2所述的实施例中,该测试系统还可以包括电源模块U8,电源模块U8被设置为向测试系统的其他模块供电。
在整个测试系统中,测试系统内的各模块是固定不变的,因此,测试人员只需要根据要求来更换不同型号的待测无刷电机。不同型号的无刷电机的功率不同,为了满足不同功率要求的无刷电机的使用,可以是电子调速器U2和电源模块U8的功率均较大。
本发明还提供了一种根据上述测试系统的测试方法,图3为根据本发明测试系统的测试方法的一种实施方式的流程图。
根据图3所示,包括以下步骤:
步骤S310,控制测试系统在第一时间段内输出第一三相电机控制信号,以驱动待测无刷电机按照第一目标转速转动。
步骤S320,检测待测无刷电机在第一时间段内的实际转速与第一目标转速之间的差值是否在第一预设范围内,如是,则执行步骤S330;如否,则可以执行步骤S350,报警提醒测试人员,并结束该测试方法。
其中,步骤S310和步骤S320是同时执行的,即在第一时间段内驱动待测无刷电机转动的同时检测其实际转速。
步骤S330,控制测试系统在第二时间段内输出第二三相电机控制信号,以驱动待测无刷电机按照第二目标转速转动。
步骤S340,检测待测无刷电机在第二时间段内的实际转速与第二目标转速之间的差值是否在第二预设范围内,如是,则可以继续执行步骤S310,重复本测试方法的测试步骤;如否,则可以执行步骤S350,报警提示测试人员,并结束该测试方法。
其中,步骤S330和步骤S340是同时执行的,即在第二时间段内驱动待测无刷电机转动的同时检测其实际转速。第一预设范围和第二预设范围可以相同。
在本发明的一个具体实施例中,第一时间段和第二时间段可以但不限于均是5s,第一目标转速例如可以但不限于是8000rpm,第二目标转速例如可以但不限于是10000rpm。这样,根据本实施例的测试方法,就可以模拟并测试在无人机悬停和加速时待测无刷电机的转动情况。
在本发明的另一个具体实施例中,如图4所示,在执行步骤S340的检查结果为是的情况下,可以是执行步骤S410~S430。
步骤S410,检测测试时间是否超过设定时间,如是,则执行步骤S420,并将测试时间清零,开始重新计时;如否,则重复执行步骤S310。其中测试时间具体是指重复执行步骤S310和步骤S330的累计时间,设定时间例如可以是但不限于是25min。
步骤S420,控制测试系统在第三时间段内停止输出三相控制信号,以使待测无刷电机停止转动。其中,第三时间段例如可以但不限于是25min。
步骤S430,检测待测无刷电机在第三时间段内的实际转速是否为0,如是,则可以继续执行步骤S310,重复对待测无刷电机进行测试;如否,则可以执行步骤S350,报警提示测试人员,并结束该测试方法。
具体的,步骤S420和步骤S430可以是同时执行的,即在第三时间段内控制待测无刷电机停止转动的同时检测其实际转速。
这样,根据本实施例的测试方法,就可以模拟并测试在无人机工作状态下和非工作状态下待测无刷电机的转动情况。
上述各实施例主要重点描述与第三方实施例的不同之处,但本领域技 术人员应当清楚的是,上述各实施例可以根据需要单独使用或者相互结合使用。
虽然已经通过例子对本发明的一些特定实施例进行了详细说明,但是本领域的技术人员应该理解,以上例子仅是为了进行说明,而不是为了限制本发明的范围。本领域的技术人员应该理解,可在不脱离本发明的范围和精神的情况下,对以上实施例进行修改。本发明的范围由所附权利要求来限定。

Claims (11)

  1. 一种无刷电机的测试系统,其特征在于,包括控制模块、电子调速器、转速检测模块、及用于连接待测无刷电机的电机接口,所述控制模块被设置为输出电机调速信号至所述电子调速器;所述电子调速器被设置为根据所述电机调速信号输出三相电机控制信号至所述电机接口,所述三相电机控制信号用于驱动所述待测无刷电机按照与所述电机调速信号的占空比相对应的目标转速转动;所述转速检测模块被设置为检测所述待测无刷电机的实际转速,并将所述实际转速发送至所述控制模块;所述控制模块被设置为检测所述实际转速与所述目标转速之间的差值是否超出预设范围。
  2. 根据权利要求1所述的测试系统,其特征在于,所述测试系统还包括报警模块,所述控制模块被设置为在所述实际转速与所述目标转速之间的差值超出所述预设范围时控制所述报警模块发出警报。
  3. 根据权利要求2所述的测试系统,其特征在于,所述报警模块为蜂鸣器或者发光二极管。
  4. 根据权利要求1-3中任一项所述的测试系统,其特征在于,所述测试系统还包括输入模块,所述输入模块被设置为接收用户输入的控制指令,所述控制模块根据所述控制指令输出对应的电机调速信号;和/或,所述输入模块被设置为接收用户输入的控制参数,所述控制模块根据所述控制参数输出对应的电机调速信号。
  5. 根据权利要求1-4中任一项所述的测试系统,其特征在于,所述测试系统还包括显示模块,所述显示模块被设置为显示所述实际转速。
  6. 根据权利要求5所述的测试系统,其特征在于,所述输入模块和所述显示模块由上位机提供。
  7. 根据权利要求1-6中任一项所述的测试系统,其特征在于,所述测试系统还包括存储模块,所述存储模块被设置为存储无刷电机的型号、无刷电机的目标转速和电机调速信号的占空比之间的对应关系。
  8. 根据权利要求1-7中任一项所述的测试系统,其特征在于,所述转 速检测模块由一光电传感器提供。
  9. 根据权利要求1-8中任一项所述的测试系统,其特征在于,所述测试系统还包括电源模块,所述电源模块被设置为向所述测试系统供电。
  10. 根据权利要求1-9中任一项所述的测试系统,其特征在于,所述控制模块和由一处理器芯片提供。
  11. 根据权利要求1-10中任一项所述的测试系统的测试方法,其特征在于,包括:
    控制所述测试系统在第一时间段内输出第一三相电机控制信号,以驱动所述待测无刷电机按照第一目标转速转动;
    检测所述待测无刷电机在所述第一时间段内的实际转速与所述第一目标转速之间的差值是否在第一预设范围内;
    控制所述测试系统在第二时间段内输出第二三相电机控制信号,以驱动所述待测无刷电机按照第二目标转速转动;
    检测所述待测无刷电机在所述第二时间段内的实际转速与所述第二目标转速之间的差值是否在第二预设范围内。
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