梯形波 meaning in English
keystone wave
stepped wave
trapezoidal wave
Examples
- The ideal bemf waveform of bldcm is trapezoid with 120 ! platform width . in the 120 conduction mode , the stator current is not ideal due to the stator inductance , and the torque ripple occurs
理想的永磁无刷直流电动机的反电动势的波形是120平顶的梯形波，在三相六状态120导通方式控制下，电流由于电机定子电感的存在而不是理想方波，因此产生了换相转矩脉动。 - The non - ideal bemf waveform of bldcm is often caused by two facts . one is that the platform width of bemf waveform is less than 120 ; the other is the cogging harmonics existed in the bemf waveform
非理想反电动势波形的无刷直流电机有两种情况，一种是反电动势的梯形波的平顶宽度小于120 ；一种是由于磁场分布受齿槽的影响，反电动势存在齿谐波，使其波形发生畸变。 - To guarantee the validity and speediness insimulation , the back - emf is generated using piecewise linear curves . in the double loop of control system , a pi controller is adopted in the speed loop and a hysteresis current controller is adopted in the current loop
为保证仿真快速性和有效性,模型采用分段线性法生成梯形波反电动势,系统采用双闭环控制:速度环采用pi控制,电流环采用滞环电流控制。 - Secondly , the effects of the crest width of the back - emf waveform to the torque ripple in the 120 ? conduction mode are analyzed , among which the effects of the advance commutation angle to the torque ripple are quantificationally analyzed for the bldcm drives whose back - emf waveform crest width is less than 120 ? ,
其次分析了120导通方式下反电动势平顶宽度对转矩脉动的影响，对于平顶宽度小于120电角的非理想梯形波反电动势，定量分析了换相超前角对换相转矩脉动的影响。 - For the bldcm which has a neither sinusoidal nor trapezoidal back - emf , that is , for a general shape back - emf bldcm , this dissertation proposes a novel id = 0 vector control method . by this method , the iq for a constant torque to produce is calculated through coordinate transformation , and the reference iq is tracked by vector control in the dq0 frame
对于实际反电动势波形既非正弦又非梯形波的无刷直流电动机，提出一种新型的任意波形反电动势无刷直流电动机的i _ d = 0矢量控制方法，通过坐标变换浙江大学博士学位佑文摘要求解产生恒定电磁转矩所需的q轴电流，并在dqo坐标系下通过矢量控制对q轴参考电流进行跟踪。