Control Techniques Unidrive 18.5KW Inverter Unit

Module Feature

Unidrive 18.5kW belongs to Unidrive series high performance AC inverter manufactured by Control Techniques. Rated power 18.5kW,three-phase 380-480VAC,50/60Hz mains input. It supports V/F,open-loop vector and RFC-A rotor flux control for induction motors. Equipped with multi-channel digital and analog I/O terminals,option expansion slot for encoder feedback and fieldbus communication modules. Built-in dynamic braking transistor and LED local keypad. Widely used in conveyors,mixers,pumps,fan and general factory automation equipment.

Working principle

Three-phase 50/60Hz AC mains power is rectified to DC bus. IGBT power stage outputs adjustable voltage and frequency AC to regulate induction motor speed and torque. Accepts analog,digital or fieldbus command signals. RFC-A algorithm provides high stability open-loop motor control. Built-in dynamic braking circuit absorbs regenerative energy during motor deceleration.

Onboard components

Input rectifier bridge,IGBT power module,main control PCB,LED keypad panel,dynamic braking transistor,temperature controlled cooling fan,power terminal block,control I/O terminal block,option module connector.

LED indicators

Power LED,run status LED,fault alarm LED.

Hardware self-diagnosis

Overvoltage,undervoltage,overcurrent,overtemperature,output short circuit,earth fault,phase loss,motor overload detection.

Programming software

CTSoft / Unidrive M Connect software,supports motor auto-tune,real-time speed monitoring,fault log reading and parameter backup & restore.

Electrical & Process Parameters

Model:Unidrive 18.5KW Brand:Control Techniques Device type:Unidrive Series AC Variable Frequency Inverter Power rating:18.5kW Input voltage:380 ~ 480VAC three phase Input frequency:50/60Hz Control mode:V/F,open-loop vector,RFC-A rotor flux control Feedback:Encoder feedback available via option module Communication:RS485 Modbus RTU,expandable via option card Cooling:Forced air cooling Protection:Over temperature,over current,over voltage,under voltage,short circuit,earth fault,phase loss,motor overload protection

Mechanical & Structure

Mounting:Panel mounting inside control cabinet Protection class:IP20 Housing:Metal frame housing

Environmental

Operating temperature:-10℃ ~ +40℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:20~80% non-condensing Certification:CE,UL compliant Status: Control Techniques Unidrive 18.5kW inverter for general-purpose industrial motor control applications

Installation

Follow ESD safety procedure before handling.Mount vertically and reserve sufficient ventilation gap.Separate power cables and signal cables to reduce EMI interference.Connect three-phase mains to L1/L2/L3 terminals and motor cable to U/V/W terminals.Complete motor auto-tune and parameter commissioning before operation.

Interface

Main power terminal,motor output terminal,digital/analog I/O terminal,encoder connector,option module slots,keypad port.

Diagnostic

Over current:motor winding short circuit,cable damage or mechanical jam. Overheat:blocked heat sink or continuous overload. Under voltage:input mains fluctuation or phase missing. Unstable motor speed:incorrect motor parameters or poor shielding of signal wires.

Product Brief

Control Techniques Unidrive 18.5kW AC variable frequency inverter,380-480V three phase,50/60Hz input frequency,supports RFC-A open loop vector control,built-in braking transistor for fan,pump,conveyor and general industrial automation.