E 2.5.3.2 Podstawy przetworników częstotliwości

Opis produktu – E 2.5.3.2 Podstawy przetworników częstotliwości

This laboratory practical utilises training panels in panel frames. The power is supplied to the frequency converter directly from the mains (mains voltage, 230 V).

Objectives

• Protective measures and electrical safety
• Components of a frequency converter with variable voltage link
• Setting parameters for frequency converters
• Gaining skill in measurement techniques

This equipment set offers an insight into the circuitry of frequency converters with variable voltage link. Measurements are made on the components of a frequency converter especially designed for educational purposes. The experiments use a static electronic load, which facilitates the evaluation of current and voltage curves. A rotating field with variable frequency is also investigated. The following components can be accessed:

• Input bridge rectifier with link capacitor
• Brake chopper
• Power inverter

Students work in the power engineering lab with mains voltage. Experiments procedures are contained in a printed manual.

The experiments are designed for intermediate and advanced levels.

Topics

• Rotating field and space vectors
• Feeding a sinusoidal signal from the normal three-phase mains network
• Representation of space vectors
• Generation of a rotating field from a DC voltage
• Putting a converter into operation
• Fault-free activation of the mains voltage
• Activation of the input rectifier
• Switching off the converter
• Discharging the buffer capacitor
• Investigation of input rectifier
• Response with zero-delay angle setting, Cl = 00
• Control characteristic
• Loading
• Control via external control voltage
• Investigation of output inverter
• Control of individual power transistors
• Generation of rotating field
• Loading with resistive load

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