SCHUMACHER ATCS-15 High Precision Digital Controller

Product Description

ATCS-15 (hardware revision 1464-0320) is a dedicated core main control board independently developed by German SCHUMACHER, specially applied to high-power high-frequency 

induction heating power inverter units.

It takes charge of the whole machine’s closed-loop operation logic, adopting high-speed DSP digital processing chip and PLL phase-locked loop resonant frequency automatic tracking algorithm. 

In the heating process, the impedance and resonant frequency of the coil load will change with workpiece temperature rise and Curie point transformation; ATCS-15 monitors load real-time 

parameters in microsecond level, dynamically adjusts the IGBT inverter switching frequency to lock the circuit at the optimal resonant point, greatly improving power transmission efficiency 

and protecting power devices from reactive overload impact.

The module receives analog setpoint signals (0–10V/4–20mA) from upper PLC/SCADA system to realize stepless power regulation, integrates overcurrent, overvoltage, overheating, short-circuit 

and water flow interlock full protection logic, with front panel LED fault status indication, PCB with three-proof conformal coating, standard rack plug-in installation structure. It is an irreplaceable 

key spare part for metal surface quenching, brazing, local annealing, hot forging preheating and other thermal processing equipment in metallurgy, automobile parts manufacturing and machinery 

processing industries.

Technical Specifications

Model: ATCS-15, Revision Number: 1464-0320

Brand: SCHUMACHER, Origin: Germany

Core Function: Resonant frequency auto-tracking, inverter power closed-loop regulation, complete device protection

Main Processor: High-speed 32-bit DSP operation chip

Frequency Tracking Response Speed: Microsecond-level fast PLL frequency locking

External Command Signal: 0–10VDC voltage signal / 4–20mA current signal configurable

Drive Output: PWM waveform drive for IGBT power inverter module

Power Supply: 24VDC industrial DC power supply

Communication Interface: RS485 Modbus RTU, CANopen fieldbus protocol

Protection Items: Overcurrent, DC bus overvoltage, module overtemperature, water shortage interlock, coil short-circuit protection

Operating Ambient Temperature: -20℃ ~ +60℃ continuous full-load operation

Storage Temperature: -40℃ ~ +85℃

Ambient Humidity: 5%–95% non-condensing environment, moisture-proof, mildew-proof and salt spray resistant coated circuit board

Protection Class: IP20, installed inside heating power control cabinet only

Mounting Method: Eurocard slot plug-in fixed installation inside power cabinet rack

Net Weight: Approx. 0.45kg

Certifications: CE, industrial EMC anti-electromagnetic interference certification

Key Features

Professional induction heating dedicated resonant tracking algorithm, automatically adapt to load impedance drift caused by workpiece temperature change, maintain near-unity power 

factor and maximize heating efficiency.

Ultra-fast hardware-level fault detection and latch protection, immediately block drive pulse output once abnormal conditions occur, effectively avoid IGBT module breakdown and power supply burnout.

Standard industrial bus communication access, remotely upload running power, working frequency, fault records and receive power setting instructions via upper computer system.

Plug-and-play modular design, power-off one-to-one direct replacement without modifying peripheral wiring, greatly shorten equipment maintenance downtime for heat treatment production line.

High-precision closed-loop power modulation, stable output power in long-time continuous working state, ensure consistent metallurgical heating effect of batches of workpieces.

Strong anti-interference circuit design, filter and isolation components resist strong electromagnetic interference generated by high-frequency inverter itself and surrounding workshop equipment.

Compact rack card layout, small cabinet space occupation, stable long-term 24-hour uninterrupted operation in dusty, high-temperature industrial workshop environment.

Mature mass application in automotive gear quenching, shaft parts surface hardening, copper pipe brazing and other high-standard thermal processes, reliable original spare part for old heating power 

supply renovation.