Application Scenarios

In a Taiyuan steel rolling mill, the YPQ102F​ is installed in the DC drive cabinet controlling the main rolling motor. It receives a speed/torque reference from the master PLC, compares it with the actual field current feedback, and outputs a controlled signal to the thyristor rectifier bridge. This ensures the motor maintains a strong and stable magnetic field during the high-torque rolling process, preventing “field weakening” that could cause production defects.

 

Parameter

Main Parameters	Value/Description
Product Model​	YPQ102F​ (also known as YT204001-KF)
Function​	Magnetic Field Control Board​ (Excitation Regulator)
Compatible Systems​	ABB ACS 600, ACS 800, DCS systems
Input Voltage​	AC 220V​ or DC 24V​ (Dual Supply Common)
Power Consumption​	≤ 15W
Control Method​	PI (Proportional-Integral) Regulator​
Communication Interface​	RS-485​ (Modbus RTU)
Relay Output​	2 x SPDT (3A 250V AC)
Operating Temperature​	-25 °C to +60 °C​
Dimensions (WxHxD)​	~100 mm x 120 mm x 40 mm
Key Application​	DC Motor/Generator Excitation, Synchronous Motor Control

 

 

Technical Principles and Innovative Values

• Innovation Point 1: High-Precision Field Current Regulation:​ The YPQ102F​ is not a generic PLC but a dedicated excitation controller. It uses a high-performance PI algorithm​ to maintain the field current with minimal ripple. This precision is critical in Taiyuan’s heavy industries, where a fluctuating magnetic field in a rolling mill motor can lead to inconsistent product thickness or even mechanical damage.
• Innovation Point 2: Seamless Integration with ABB Drives:​ The board is designed as a plug-and-play module within the ABB drive ecosystem (e.g., ACS800). It communicates directly with the main control board (e.g., RMIO) to receive setpoints and report status, simplifying the control architecture and reducing wiring complexity compared to standalone excitation cabinets.
• Innovation Point 3: Built-in Field Failure Protection:​ The board incorporates logic to detect field loss​ or under-excitation. If the actual field current drops below a safe threshold (e.g., due to a broken wire), the YPQ102F​ can trigger an immediate fault and shut down the drive via its relay outputs, protecting the motor from running uncontrollably.

 

Application Cases and Industry Value

Case 1: Mine Hoist DC Drive Upgrade, Shanxi.​ A coal mine hoist was experiencing “slip” during heavy lifting due to inconsistent field excitation. Replacing the old analog regulator with the ABB YPQ102F​ provided digital precision. The board’s fast response to load changes ensured the hoist motor maintained full torque at low speeds, increasing safety and lifting capacity without upgrading the motor itself.Case 2: Synchronous Motor Soft Start.​ In a large compressor application, the YPQ102F​ was used to control the field current of a synchronous motor during startup. It precisely applied the field only after the motor reached near-synchronous speed (as detected by the main drive), preventing the violent “pull-in” transients that can damage gears and couplings.