The panel incorporates a frequency converter designed to supply an asynchronous motor of up to 1 kW power. It consists of a triphasic invertor based on IGBTs and all of the circuitry necessary for their control.
It enables a triphasic output voltage, variable in amplitude and frequency, to be obtained, by means of the PWM modulation. The frequency may be increased to double the nominal frequency in the constant power mode, which enables a control to be obtained above and beyond the nominal speed of the motor. Sine or trapezoidal PWM modulation can be selected.
The controls incorporated enable the work mode of the converter to be selected, as well as the parameters of the system to be adjusted:
• External, internal, manual commands, ramps.
• Parameters at constant torque and power.
• Low speed torque compensation.