Difference Between Lead Angle Algorithm and Vector Mode Algorithm in CL86Y Operating Mode

This article explains the differences between the Lead Angle algorithm and Vector Mode algorithm in Parameter 24 (Operating Mode) of the CL86Y software, along with recommended use cases for each mode.


Control Logic and Characteristics of Both Algorithms

Algorithm Type	Control Logic and Characteristics
Lead Angle Algorithm	Essentially: Open-loop pulse drive + encoder position compensation. Adjusts current phase advance to synchronize current with rotor motion. Controls current phase based on preset phase advance values.
Vector Algorithm	Based on Field-Oriented Control (FOC), decomposes three-phase current into excitation and torque components for independent regulation. Precisely controls current magnitude and direction, decoupling torque and magnetic field.

Comparative Analysis and Typical Application Scenarios

Dimensions	Lead Angle Algorithm	Vector Algorithm
Advantages	High power output at medium-high speeds with fast response; Delivers high torque in the 800-1200rpm range	Lower temperature rise; Reduced noise levels; High control precision (especially in low-speed ranges)
Disadvantages	Higher motor temperature rise; Increased operational noise; Relies on encoder feedback for position loop compensation; Poor anti-interference capability at low speeds, prone to jitter	Weaker locked-rotor PID capability; Lower power output at medium-high speeds compared to Lead Angle algorithm; Complex parameter adaptation; Slightly inferior dynamic response
Applicable Scenarios	Rapid response, quick start/stop, and medium-high speed operation (800~1200rpm) requiring high power output; Industrial robot joint drives: Fast start-stop needed (e.g., welding arms); UAV/RC power systems: Optimizes efficiency via phase advance during high-speed propeller rotation for sudden acceleration/direction changes; Power tools (impact drills/cutters): Requires instant high torque at high speeds with tolerance for temperature/noise; Fluid machinery (fans/pumps): Prioritizes high flow output at medium speeds (~1000rpm) with simplified control logic	Scenarios requiring low motor temperature rise, quiet operation, and medium-low speed operation (<800rpm); CNC machine spindle control: Constant torque cutting at low speeds (<800rpm) with current decoupling for precision; New energy vehicle drive motors: Optimized current components for urban low-speed driving to reduce iron losses and improve range; Medical equipment (e.g., CT scanners): Requires low noise (<50dB) and high-precision positioning with sinusoidal current drive to minimize vibration; Textile machinery tension control: Real-time load response with closed-loop regulation to maintain yarn tension fluctuation within ±1%

Updated on: 25/06/2025