ABB 3BHE029594R1102 PPD239A1102 Excitation controller
Delivery time 3 days
Product origin New/used
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The working principle of the PPD239A1102 excitation controller usually involves
The working principle of the PPD239A1102 excitation controller usually involves the following key steps:
Detection and measurement: First, the excitation controller detects the output voltage and current of the generator through sensors. These sensors convert the voltage and current signals into electrical signals and then send them to the controller.
Signal processing: After receiving these signals, the PPD239A1102 excitation controller processes these signals. According to the preset parameters and the set control strategy, the controller calculates the required excitation current.
Control signal output: Next, the controller sends the calculated excitation current signal to the excitation system. This signal is the key to controlling the magnitude and direction of the excitation current.
Excitation system operation: The excitation system usually consists of an excitation transformer and an excitation power supply. The excitation transformer converts the low-voltage signal sent by the controller into a high-voltage signal and then supplies it to the excitation power supply. The excitation power supply converts the high-voltage signal into direct current and supplies it to the excitation coil of the generator.
Magnetic field generation and regulation: After the excitation coil of the generator receives the DC signal provided by the excitation power supply, a constant magnetic field is generated. This magnetic field changes with the change of the excitation current, which in turn affects the output voltage and current of the generator. The PPD239A1102 excitation controller achieves precise regulation of the generator output voltage and current by precisely controlling the magnitude and direction of the excitation current.
Feedback and Regulation: In order to maintain the stability of the generator output voltage and current, the PPD239A1102 excitation controller also adopts a feedback mechanism. It continuously detects the actual output voltage and current of the generator and compares them with the preset values. If there is a difference, the controller will adjust the excitation current accordingly to achieve stable output voltage and current.
