half voltage start 半电圧始动
half voltage synchronize 半电圧同期
half voltage motor [电] 半电压电动机
half voltage starting 半电压起动 ; 半电压启动
half-voltage 半电压
half voltage start-up mode 半压启动方式
circuit breaker for half-voltage circuit 低减电圧回路遮断器
half-supply voltage principle 半供电压原则
half-supply voltage principles 半电源电压原理
This permits the SCR to control only half of the AC positive wave; half voltage is applied to the load when the SCR initially fires.
这使得SCR来控制交流正波的一半，另一半的电压施加到在SCR初始触发该负载。
DIS has its own drawbacks by having half of the plugs firing with an acceptable negative voltage, while the other half is fired by the less acceptable positive polarity.
DIS有自身的缺点，由于有一半的插头接通一个可接受的负电压，而另一半接通不太能接受的正极。
Together these four sectors accounted for more than half of all medium voltage drive revenues in 2008.
这四个行业在2008年合共占了中压电机全部销售额的一半多。
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