By digital simulation, the Ac carried wave system and its equivalent Dc system are checked and the feasibility of Dc method equivalent to the Ac carrier wave system is verified.
通过数字仿真，比较了交流载波系统和其等效直流系统，验证了交流载波系统等效直流方法的可行性。
Its software is designed to calculate the running parameters of the AC drive system, including transformer, quadrant rectifier, DC circuit, inverter, AC motor and train load.
系统采用软件方式实时计算交流传动系统的运行参数，包括变压器、四象限整流器、直流中间回路、逆变器、电机及负载。
The problem of oversimplification and improper selection of DC model, which exists in the DC modeling when AC and DC systems interact in AC/DC hybrid power system, is discussed.
讨论了目前研究交、直流混合电网交直流系统相互作用时在直流建模上存在的模型过度简化及模型选用不恰当的问题；
In the system, Intel 80c196mc is used as control center and IPM is used as an intelligent power device in the main circuit of AC DC AC voltage type inverter.
该系统以80c 196MC为控制核心，采用IPM智能功率模块为功率元件，组成了交直交电压型逆变器主回路。
Thus, the object of the power system analysis software has been changed from AC power system into AC-DC hybrid power system, which requires the software for the AC power system to be improved.
这样，电力系统分析软件的分析对象从纯交流系统变为交直流混联电力系统，这就要求对纯交流系统的分析软件进行改进。
A direct harmonic analysis approach for AC-DC-AC conversion system was presented to simplify the complicated harmonic calculation process.
为了简化ac - DC - AC变换器复杂的谐波计算过程，采用直接谐波计算对变换器进行了谐波分析。
A generator system that includes a three-phase ac machine and an active rectifier bridge employing low on-resistance MOSFET switches for converting the ac current from the machine to a DC current.
高效发电机。一种发电机系统包括三相ac电机和应用低导通电阻MOSFET开关的有源整流器电桥，用于将来自电机的AC电流转换为DC电流。
The AC servo system of FANUC 11 series is a AC-DC-AC conversion frequency speed adjusting system, which use PWM as the speed-adjusting control method.
FANUC一11型交一直一交频调速系统，调速的控制方法为脉冲宽度调制(pwm)法。
In the alteration of the rewinder's controlling system, DC driving is replaced by ac driving, and frequency governors are used to control the ac motors.
在对复卷机控制系统的改造中，我们用交流传动代替直流传动，用变频器对交流电机进行调速控制。
It should be noted that the DC transmission system does not contribute to the fault current flowing in the AC system5 during the AC faults.
应注意到，直流输电系统并不会增加交流系统故障时的故障电流。 收藏。
It should be noted that the DC transmission system does not contribute to the fault current flowing in the AC system5 during the AC faults.
应注意到，直流输电系统并不会增加交流系统故障时的故障电流。 收藏。
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