User-friendly inverter control panel for overhead crane systems,
precise speed contro
Braking Unit and Braking Resistor: For hoists and trolleys
(especially during downhill or rapid deceleration), when the motor
is generating power, the inverter's DC bus voltage increases. When
the braking unit detects that the bus voltage exceeds the
threshold, it connects the braking resistor, converting the
regenerative energy into heat and dissipating it, ensuring safe and
rapid deceleration and stopping, and preventing inverter
overvoltage failure.
PLC or Intelligent Controller: Serves as the logic control core,
processing operating instructions, safety interlocks, speed
settings, status monitoring, fault diagnosis, etc., and
coordinating the operation of multiple inverters (trolleys,
trolleys, and hoists).
Contactors and Circuit Breakers: Control the main power supply,
isolate the inverter's input and output, and provide protection
(overload, short circuit).
Protection Devices: Comprehensive protection circuitry includes
protection for overcurrent, overvoltage, undervoltage, overheating,
short circuit, phase loss, ground fault, and motor stall/overload.
Interface Terminal Block: Connects control console commands, limit
switches, safety devices (overload limiter, height limiter, door
limiter, etc.), encoder/speed feedback signals (required for
closed-loop vector control), status feedback signals, etc.
Cooling System: Forced air cooling (fans) is commonly used to
ensure that cabinet components (especially the inverter and brake
resistor) operate within the permitted temperature. Large cabinets
may require air conditioning or water cooling.
Human-Machine Interface: May be equipped with a touch screen or
text display for parameter setting, status monitoring, fault alarm
display, and operation log query.
