Control Techniques SPMD1402M Modular Drive Power Unit

Module Feature

SPMD1402M is Control Techniques Unidrive SP series modular power stage module. It is the power section without integrated control board, can be matched with SP series control card, and supports multi-module parallel expansion to realize higher power output. It supports V/F control, open-loop vector and encoder closed-loop vector control, high low-speed torque performance. It is widely used for large extruders, metallurgical main drives, paper machines and dynamic test benches. This series has been discontinued, mostly used as refurbished spare parts for legacy automation systems.

Working principle

The DC bus supplies power to the internal IGBT power unit. The control board sends PWM signal to drive IGBT, outputs adjustable frequency and voltage three-phase AC to motor. When multiple modules are paralleled, internal current sharing circuit balances output current of each unit. It supports external braking resistor for fast deceleration.

Onboard components

IGBT power module, DC bus terminal, current sampling circuit, cooling fan assembly, power drive interface, parallel current sharing interface, control board docking socket.

LED indicators

Module body has power and fault LED indicators; operation parameters and fault codes are displayed on the matched control panel.

Hardware self‑diagnosis

Power-on self-check covers overvoltage, undervoltage, overcurrent, overtemperature, fan fault, current sharing abnormal and communication failure. Fault information is uploaded to the control motherboard and stored.

Programming software

Commissioning, parameter setting and fault diagnosis use Control Techniques CTSoft software.

Electrical & Process Parameters

Model:SPMD1402M Brand:Control Techniques Device type:Unidrive SP Modular Power Stage Rated supply:3‑phase 380‑480V AC Continuous output current:315 A Control mode:V/F, open/closed-loop vector Function:High-power motor speed and torque regulation, multi-module parallel expansion

Mechanical & Structure

Mounting:Cabinet rack mounting Protection class:IP20 Housing:Metal modular frame with forced air cooling

Environmental

Operating temperature:0℃ ~ +40℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing Certification:CE compliant Status:Discontinued legacy modular drive spare module

Installation

Install the power module on cabinet rack, reserve cooling space. Complete DC bus, motor cable, control board and parallel bus wiring. Install matching control card, set motor parameters and carry out auto-tuning. For parallel configuration, set current sharing parameters.

Interface

DC bus terminal, motor output terminal, control board docking connector, parallel synchronization bus, fan power terminal.

Diagnostic

Overcurrent alarm:Motor short circuit, cable damage or current sharing failure in parallel system. Overtemperature alarm:Fan damage, radiator fouling, insufficient ventilation. Parallel imbalance alarm:Sharing cable loose or inconsistent module parameters.

Product Brief

Control Techniques SPMD1402M Unidrive SP modular power module, 315A 400V, vector control, supports multi-module parallel connection, spare power unit for old high-power industrial drive systems.