A500 Open Loop Elevator Frequency Inverter

A500 series is a special frequency inverter for elevator, mainly used to control the speed of elevator three-phase asynchronous motors. It adopts high-performance vector control technology, low-speed high-torque output, has good dynamic characteristics. Moreover, with stable performance, it has strong overload capacity.

Features:

1. Support single-phase 220V, three-phase 380V;

2. Support vector control three-phase AC asynchronous motor and three-phase permanent magnet synchronous motor;

3. With speed sensor vector control, speed sensorless vector control, V/F control, and V/F separation control;

4. Sensorless vector control enhances low-speed stability, stronger low-frequency load carrying capacity, and support SVC torque control.

Power Range:

220V  2.2kw ~3.7KW

380V  3.7kw ~15KW

Typical wiring 1 (use multi-reference input as frequency reference)

Typical wiring 2 (use analog input as frequency reference)

IGBT Enable

In all elevator applications, an Output Contactor is installed between the inverter output U, V, W and the motor. In an emergency, the Safety Line is opened due to an unsafe condition and the Output Contactor disconnects the power from the inverter to the motor (the motor brake is also applied at the same time). When the Output Contactor opens with current flowing through to the motor (inverter IGBTs are active), there will be arcing in the Output Contactor depending on the motor inductive energy. Arcing of the Output Contactor can reduce the lifetime of the contactor and in some severe cases can damage the contacts poles. Therefore it is recommended to electronically switch off the inverter IGBT firing circuits before opening the Output Contactor (milliseconds later). The inverter IGBT firing can be electronically switched off with the "IGBT Enable" function as shown in the timing charts below.

CAUTION: An Output Contactor MUST always be installed as the final safety power cut off to the motor. The "IGBT Enable" function is NOT a substitute for an Output Contactor, it is designed to work together with the Output Contactor.