GTAKE specializes in designing and producing innovative AC drives (also known as variable frequency drives), electric vehicle motor controllers, bidirectional DC sources, and test rigs with advanced control algorithms and cutting-edge technology, delivering optimal performance and reliability for industrial automation and new energy applications.
Speed control of electric motors is fundamental to modern industrial automation and electric vehicle propulsion. Whether you need precise speed regulation for a conveyor belt, smooth acceleration for an electric truck, or constant torque across a wide speed range for a crane, GTAKE offers comprehensive solutions tailored to your specific motor control requirements. With decades of experience in power electronics and motor drive technology, GTAKE delivers high-performance AC drives and EV motor controllers that set the standard for accuracy and reliability.
Electric motor speed control involves regulating the rotational speed of a motor to match the requirements of a specific application. Different control methods offer varying levels of precision, dynamic response, and efficiency .
V/F control maintains a constant ratio between voltage and frequency to keep the air-gap flux constant, ensuring stable torque across the speed range . This scalar control method is widely used for applications that do not require fast dynamic response or precise torque control, such as fans, pumps, and basic conveyors .
Vector control, also known as field-oriented control, provides independent control of torque and flux, enabling high-performance speed regulation similar to that of DC motors. This method delivers faster response, higher accuracy, and better efficiency across the entire speed range .
Sensorless vector control estimates rotor position and speed without mechanical sensors, reducing system cost and complexity while maintaining excellent performance . GTAKE drives achieve speed control accuracy of ±0.2% with sensorless vector control .
For the highest precision, closed-loop vector control uses encoder feedback to achieve speed control accuracy of ±0.02% and torque response of less than 5ms . This method delivers 200% starting torque at 0Hz, making it ideal for demanding applications like hoists, cranes, and elevators .
GTAKE offers a comprehensive portfolio of products designed to deliver precise speed control for both AC induction motors and permanent magnet synchronous motors (PMSM).
The GK800 series variable frequency drive delivers exceptional speed control performance for industrial applications .
Key Speed Control Specifications :
Speed adjustable range: 1:200 (sensorless vector control), 1:1000 (closed-loop vector control)
Speed control accuracy: ±0.2% (sensorless vector control), ±0.02% (closed-loop vector control)
Speed fluctuation: ±0.3% (sensorless vector control), ±0.1% (closed-loop vector control)
Torque response: Less than 10ms (sensorless vector control), less than 5ms (closed-loop vector control)
Starting torque: 180% at 0.25Hz (sensorless vector control), 200% at 0Hz (closed-loop vector control)
Output frequency range: 0.00-600.00Hz
Applicable motors: Asynchronous and synchronous motors
Overload capability: 150% for 1 minute, 180% for 10 seconds, 200% for 0.5 seconds
Control Techniques Supported :
V/F control (including voltage and frequency separated control)
Sensorless vector control 1 (robust vector control)
Sensorless vector control 2 (precise vector control)
Closed-loop vector control (with encoder feedback)
Position control (fixed length or angular positioning)
The GK900 book-type versatile AC drive offers advanced speed control capabilities for complex applications .
Key Specifications :
Control techniques: V/F, SVC1, SVC2, vector control
Speed adjustment range: 1:100 (V/F control); 1:200 (SVC1, SVC2); 1:1000 (vector control)
Starting torque: 180% at 0.5Hz (SVC1); 180% at 0.25Hz (SVC2); 200% at 0Hz (vector control)
Speed control accuracy: ±0.5% (SVC1); ±0.2% (SVC2)
Applicable motors: Asynchronous and synchronous motors
GTAKE’s electric vehicle motor controllers are specifically designed for the demanding requirements of traction applications, delivering precise speed control across all operating conditions .
Key Features :
Wide speed range: Excellent torque output capacity across the entire speed range, including the constant power region above rated speed
Smooth operation: Advanced dynamic control algorithms ensure vibration-free operation at different speeds and road conditions
High efficiency: Maximum efficiency up to 98.5% (system) and 94% (drive)
Protection grade: IP67 for excellent environmental adaptability
Motor compatibility: Supports both permanent magnet synchronous motors and AC asynchronous motors
Communication: CANopen (CiA 402) for seamless vehicle integration
Available Series:
D Series: D03, D06, D08, D09, D11 EV HEV motor controllers for light vehicles and three-wheelers
G Series: G02, G03, G04, G05 EV HEV motor controllers for medium to heavy vehicles
M Series: M03, M04, M15, M16 frame EV HEV traction motor controllers for heavy-duty applications
| Control Method | Speed Accuracy | Speed Range | Starting Torque | Applications |
|---|---|---|---|---|
| V/F Control | ±0.5% | 1:100 | 150% at 2.0Hz | Fans, pumps, basic conveyors |
| Sensorless Vector Control | ±0.2% | 1:200 | 180% at 0.25Hz | General industrial, mixers, extruders |
| Closed-Loop Vector Control | ±0.02% | 1:1000 | 200% at 0Hz | Cranes, hoists, elevators, precision positioning |
Source: GTAKE product specifications
GTAKE drives employ sophisticated control strategies including V/F control, sensorless vector control, and closed-loop vector control to match the exact requirements of your application .
All GTAKE drives and controllers support both asynchronous (induction) and synchronous (PMSM) motors, providing flexibility in system design .
With speed control accuracy as high as ±0.02% and torque response as fast as 5ms, GTAKE drives deliver the precision required for demanding applications .
GTAKE products feature robust overload capabilities (150% for 1 minute, 200% for 0.5 seconds) and wide operating temperature ranges (-10°C to 50°C) .
Full protection features including overcurrent, overvoltage, overtemperature, and short circuit protection ensure reliable operation and equipment safety .
GTAKE products carry CE, RoHS, and other international certifications, ensuring compliance with global standards .
Conveyors and material handling
Pumps and fans
Compressors and blowers
Machine tools and spindles
Printing and packaging machines
Textile machinery
Electric passenger cars
Logistics vehicles and delivery vans
Light commercial vehicles
Three-wheelers and auto rickshaws
Golf carts and sightseeing cars
Cranes and hoists
Elevators and lifts
Mining and construction equipment
Port machinery
Q: What is the difference between V/F control and vector control for speed regulation?
A: V/F control is a scalar method that maintains a constant voltage/frequency ratio, suitable for applications without fast dynamic requirements . Vector control (field-oriented control) independently controls torque and flux, providing faster response, higher accuracy, and better efficiency across the entire speed range .
Q: Can GTAKE drives control both induction motors and synchronous motors?
A: Yes, GTAKE AC drives and EV controllers are designed to work with both asynchronous (induction) motors and synchronous (PMSM) motors .
Q: What speed control accuracy can I expect from GTAKE drives?
A: Depending on the control method, GTAKE drives offer speed control accuracy of ±0.5% with basic V/F control, ±0.2% with sensorless vector control, and ±0.02% with closed-loop vector control using encoder feedback .
Q: Do GTAKE EV motor controllers support regenerative braking?
A: Yes, all GTAKE EV motor controllers support regenerative braking, capturing energy during deceleration to recharge the battery and extend vehicle range .
Q: What communication protocols are supported for speed control integration?
A: GTAKE drives support Modbus RTU/ASCII as standard, with optional Profibus-DP, CAN, and CANopen for industrial and vehicle applications .
Q: How do I select the right speed control solution for my application?
A: Selection depends on your motor type (asynchronous or synchronous), required speed accuracy, dynamic response needs, and environmental conditions. Contact GTAKE engineers for personalized assistance in choosing the optimal solution.
For detailed technical information or to discuss your specific speed control requirements, please contact GTAKE. Our engineering team is ready to assist you in selecting the optimal solution for your application.
