针对火炮指挥系统供电电源高可靠性要求，设计了一种采用相位调制跟踪法的全数字式电源并联系统。

A parallel operation control method based on a modulated phase tracking method was designed for high reliability requirement of uninterrupted power supply used in gun command system.

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分析了传统的PWM_ON调制方式对无刷直流电动机在非换相期间由于截止相的反并联二极管续流而导致转矩脉动的原因。

The torque ripple caused by diode freewheeling of the inactive phase during non-commutation state of PM brushless DC motor(BLDCM)when using the PWM_ON type of pulse width modulation was analyzed.

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在本文使用的控制策略中，并联部分由PI控制和定时滞环比较PW M控制组成，而串联部分的控制则采用三角载波调制的PWM控制。

The parallel part control consists of a Proportion-Integral (PI) control and a regular time hysteresis PWM control. The Series part control adopts a triangle wine-linear PWM control.

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