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直流电机技术参数说明

2025年9月03日

直流电机技术参数说明(DC Motor technical parameter description)

  • 以下数值都是在标称电压及外部环境温度25℃ 条件下测量或计算
    (The following values are measured and calculated at nominal voltage under the temperature at 25 ℃)

1、技术用语(Technical words)

用 语 符 号 单位 用 语 符 号 单位
电压 Voltage U V 输入功率 Input power P W
电流 Current I A 输出功率 Output power P W
无负荷电流 No-load current I0 A 最高输出功率 Maximum output power Pmax W
停动电流 Stall current Is A 效率 Efficiency η %
转数 Speed N r/m,rpm 最高效率 Maximum efficiency ηmax %
无负荷转数 No-load speed N0 r/m,rpm 转矩 Torque T g.cm,mN.m
电阻 Resistance R Ω 停动转矩 Stall torque Ts g.cm,mN.m

2、空载电流(No load current)--I0

电机在额定电压下,空载达到稳定状态时所消耗的电流,此参数受温度影响。
(The current consumed after stable under the rated voltage when there is no loaded. This parameter will be affected by different temperatures.)

3、空载转速(No load speed)--N0

电机在额定电压下,空载达到稳定状态时获得的最高转速。
(The highest speed obtained after stable under the rated voltage.)

4、堵转力矩(Stall torque)--Ts

电机在额定电压下,转速为零时输出的力矩,此参数与温度密切相关。
(Stall Torque is the torque produced by the motor whose output rotation speed is zero under the rated voltage. This parameter is highly effected by different
temperatures.)

5、起动电流(Stall current)--Is

在额定电压下,起动时和加锁时流过的最大电流。
(Stall current is the current that the motor draws when its shaft if prevented from moving.)

6、最大输出功率(Maximum output power)--Pmax

电机在额定电压下,能输出的最大机械功率。
(The maximum output power of the motor at the rated voltage.)

7、最大输出效率(Maximum output efficiency)--ηmax

电机输出的机械功率与消耗的电功率的最高比率。
(The maximum ratio of output power of the motor to the consumption of electrical power.)

8、电动势常数(Back - EMF constant)--KE(mV/rpm)

此常数反映了转子的感应电压和旋转速度之间的关系。
(The constant corresponding to the relationship between the induced voltage in the rotor and the speed of rotation.)

9、转矩常数(Torque constant)--Kt (g.cm/A)

此常数反映了电机产生的转矩和电流消耗之间的关系。
(The constant corresponding to the relationship between the torque developed by the motor and the current drawn.)

10、速度常数(Speed constant)--Kn (rpm/V)

当电机负载恒定时,加在电机上每伏电压引起的速度变化。
(The speed variation per volt applied to the motor terminals at the constant load.)

11、机械时间常数(Mechanical time constant)--tm (ms)

电机从静止状态加速到最终空载转速的63%所需要的时间
(The time required for the motor to reach a speed of 63% of its final no load speed, from standstil.)

, 其中 R: 静态电阻(Static resistance), J: 转子惯量(Rotor inertia)

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