The project objective was the development and production of a frequency innverter for the drive unit of a ventilation flap control system.
The drive train consists of the FI and an asynchronous machine (ASM) without rotor position feedback.
The electronics are located in a modified “terminal box” of the motor. The direction of rotation is determined by which terminal the mains voltage is applied to ensure downward compatibility with previous types.
The end position detection is carried out by external mechanical or electronic limit switches, which can be connected directly to the frequency inverter.
Furthermore, a digital input is available for a fast run function. A programming interface is provided for software updates, via which the logic section of the frequency inverter can alternatively be supplied with voltage without the power section being active.
The project objective was the highly dynamic torque control of a permanently excited synchronous motor in fitness equipment for circuit training (e.g. rowing, back trainer, etc.).
The frequency inverter is equipped with a CAN-BUS interface, a STO function (Safe Torque Off), an onboard 24 V/3 A switching power supply for supplying external electronics and also offers the possibility of connecting a braking resistor.