In this paper, The Test Stand for Electronic Governor Experiment is introduced, all the system of Test Stand is built.The digital electronic governor of diesel engine centres on a single-chip microcomputer of Intel 80C196 KB. On the basis of the designed hardware circuit, the system realized two digital PJD control, and can modify the control parameters on line . The key hardware of monitor an...

During the recent years, AC speed adjustment technology has a great development. Compared to vector control, direct torque control (DTC) for induction machine developed greatly because of its simple system scheme, better dynamic and static performances. This technology is based on the following control idea: by using the method of vector analysis, first, the motor\\\’s parameters of the...

Podded propulsion is a new focus in development of ship propulsion system. The debut of it accelerated the development of electric propulsion. But the study of podded propulsion is just studied interiorly, so doing the research of the podded propulsion is necessary. The thesis mainly introduces the design and debugging of the trial of speed adjustment system in the electric twin-pod propulsion...

As the development of \”Green Lighting Project\”, gas discharge lamps are preferred to their counterparts, incandescent lamps, due to its energy saving and high lighting efficiency, although they require their own match ballast equipments.Solid-state high-frequency electronic ballasts for fluorescent lamps offer considerable advantages if compared with the electromagnetic ballasts ...

The speed sensorless vector control system has strong applicability and economy benefit, the space of the system device is reduced, the cost is decreased and the reliability is improved. There are many scholars who take on research of this subject, but only some achievements were obtained in simulation research. The intention of this paper is discussing how to carry out hight-quality speed sen...

Induction heating power supply has been used extensively in the industrial process such as melting, foundry, siphon, forging, welding and surface heat treating wherewith its advantage of high heating efficiency, good controllability, and easy to mechanize and automate, etc. With an absence of domestic ultra-audio-frequency induction heating power supply at present, especially the low level of ...

The direct torque control(DTC) is one of the high performance control strategies.It directly control the electromagnetic torque and stator flux,using the analyzing method of space vector and stator flux orientation. It has the excellence of the highest precision、the shortest response time and the simplest computing.Starting at the asynchronous motor model,according to the traditional theory...

Along with the unceasing development of modernized industry, the servosystem is widespread in many systems\\\’applications day by day, at the same time, the higher performance of the servosystem is required. The PMSM-Servosystem can achieve the performances of high accuracy, high dynamic performance, wide-scope speed regulated or orientation control, so the study of Field Orientated Con...

The traction substation, as the power pivot of the electrified railway, is very important to the entire railway system.Nowadays,majority traction substations add the \”remote video\” function to the traditional functions of remote control, measure, communication and dispatch. At present, as a result of limitation of the band width,each kind of information still separately transmit...

Uncontrolled diode-rectifiers are usually adopted as the primary stage of genera arc welding inverter power source,and followed by a big smoothing capacitor.These circuits lead to distorted waveforms of input current in AC side. Arc welding power source input current distortion on the power grid caused serious pollution, and reduces the power factor of the equipment itself, thus increasing th...