VEICHI AC10 Frequency Converter -- Compact Drive for Industrial and Commercial Applications
The VEICHI AC10 series of variable frequency drives is designed for controlling asynchronous electric motors rated from 0.75 to 22 kW. This is a general-purpose frequency converter that combines affordable pricing, robust construction, and a comprehensive set of features for process automation. The VEICHI AC10 is available in two power supply variants -- single-phase 220 V and three-phase 380 V -- making it suitable for both small workshops with single-phase supply and large industrial facilities.
VEICHI Electric is a Chinese manufacturer of industrial automation equipment with over 20 years of experience. VEICHI products are certified to international standards including CE, ISO 9001, and ISO 14001. In the Ukrainian market, VEICHI frequency converters have established themselves as a reliable alternative to European brands at a moderate price point.
AC10 Series Technical Specifications
VEICHI AC10 frequency converters are built on modern IGBT modules and microprocessor-based control. The core specifications remain consistent across all power ratings, with only nominal currents and enclosure dimensions varying between models.
General Series Parameters
| Parameter | Value |
|---|---|
| Power range | 0.75 -- 22 kW |
| Input voltage | 1x220 V or 3x380 V (tolerance -15%...+10%) |
| Output frequency | 0 -- 600 Hz |
| Control modes | V/f, sensorless vector control (SVC) |
| Protection rating | IP20 |
| Built-in EMC filter | Yes (class C3) |
| Communication interface | RS-485 (Modbus RTU) |
| Overload capacity | 150% for 60 s, 180% for 2 s |
| Braking chopper | Built-in (for models up to 22 kW) |
| Protective functions | Overvoltage, overcurrent, short circuit, overheating, phase loss |
VEICHI AC10 Model Range -- Single-Phase 220 V
Single-phase AC10 models are designed for sites without three-phase power supply. Typical applications include small pumps, fans, conveyors, workshop lathes, and residential ventilation systems.
| Part Number | Power, kW | Supply | Rated Current, A | Price, UAH |
|---|---|---|---|---|
| AC10-T/S2-R75G-B-VC | 0.75 | 1x220 V | 4 | 6,264 |
| AC10-T/S2-1R5G-B-VC | 1.5 | 1x220 V | 7 | 8,526 |
| AC10-T/S2-2R2G-B-VC | 2.2 | 1x220 V | 10 | 9,396 |
VEICHI AC10 Model Range -- Three-Phase 380 V
Three-phase AC10 models represent the core industrial range. They deliver higher efficiency and a broader selection of power ratings for demanding production tasks.
| Part Number | Power, kW | Supply | Rated Current, A | Price, UAH |
|---|---|---|---|---|
| AC10-T3-R75G-B | 0.75 | 3x380 V | 3 | 7,673 |
| AC10-T3-1R5G-B | 1.5 | 3x380 V | 4 | 8,561 |
| AC10-T3-2R2G-B | 2.2 | 3x380 V | 5 | 10,222 |
| AC10-T3-004G-B | 4.0 | 3x380 V | 9.5 | 12,832 |
| AC10-T3-5R5G-B | 5.5 | 3x380 V | 13 | 15,964 |
| AC10-T3-7R5G-B | 7.5 | 3x380 V | 17 | 20,306 |
| AC10-T3-011G-B | 11 | 3x380 V | 25 | 23,229 |
| AC10-T3-015G-B | 15 | 3x380 V | 32 | 27,362 |
| AC10-T3-018G-B | 18.5 | 3x380 V | 38 | 32,842 |
| AC10-T3-022G-B | 22 | 3x380 V | 45 | 39,802 |
Motor Control Modes
The VEICHI AC10 supports two primary operating modes, selected based on the specific application requirements.
V/f Scalar Control
V/f (voltage-to-frequency) control is used for most standard applications: pumps, fans, conveyors, and mixers. The drive maintains a constant voltage-to-frequency ratio, ensuring stable torque at the motor shaft. In this mode, the AC10 can simultaneously control multiple motors connected in parallel, which is useful for systems with multiple pumps or fans.
Sensorless Vector Control (SVC)
SVC mode provides higher precision in speed and torque regulation without requiring an encoder on the motor. This is the optimal choice for machinery that demands stable torque at low speeds: extruders, winding machines, and hoists. The speed regulation range in SVC mode is 1:100, with speed accuracy of plus-minus 0.5%.
Built-In Functions and Capabilities
PID Controller
The AC10 features a built-in PID controller that enables closed-loop automatic control systems without additional controllers. This function is most commonly used for maintaining constant pressure in pumping stations or controlling temperature in ventilation and water supply systems. Simply connect a pressure sensor (4-20 mA or 0-10 V) to the analog input and set the desired pressure value.
Modbus RTU Protocol
The built-in RS-485 port with Modbus RTU protocol support allows integration of the AC10 into PLC-based automation systems. Via Modbus, all drive parameters can be read and written, status can be monitored, start/stop commands can be issued, and speed setpoints can be changed. The data exchange rate reaches up to 38,400 baud. A single RS-485 segment supports up to 32 devices.
Protective Functions
The VEICHI AC10 frequency converter is equipped with a complete set of protective functions: overvoltage and undervoltage protection, overcurrent protection, output short circuit protection, heatsink overtemperature protection, input/output phase loss detection, and ground fault protection. The drive also features an automatic restart after power failure function that can be configured through the drive parameters.
Built-In EMC Filter
All AC10 models include a built-in electromagnetic compatibility filter rated to class C3. This reduces electromagnetic interference generated by the converter and simplifies installation at sites with sensitive electronic equipment. For industrial facilities with stricter EMC requirements, an external class C2 filter can be added.
VEICHI AC10 Application Areas
With its wide power range and dual supply voltage options, the AC10 covers most typical industrial and commercial applications. Let us examine the main VEICHI AC10 use cases in more detail.
Pumping Equipment
Variable speed control of pumps is one of the most effective applications for frequency converters. The AC10 with its built-in PID controller maintains constant pressure in water supply systems by automatically adjusting pump speed according to water consumption. Based on operational data, implementing a VFD at a pumping station reduces energy consumption by 30-50% compared to throttle-based flow control.
Ventilation Systems and HVAC
In ventilation and air conditioning systems, the AC10 controls centrifugal and axial fans, providing smooth capacity adjustment based on room requirements. Soft starting without jerks extends the service life of belts and bearings. Airflow regulation via VFD instead of dampers saves 20-40% on electricity costs.
Conveyor Equipment
On production lines, the AC10 provides smooth acceleration and deceleration of belt and roller conveyors. This prevents product spillage and mechanical shocks. Precise speed adjustment capability allows synchronization of conveyor operation with other equipment on the line.
Compressor Equipment
For screw and reciprocating compressors, the VEICHI AC10 provides output regulation based on receiver pressure. This eliminates idle compressor cycles and reduces wear on mechanical components. Compressors require high starting torque, which the AC10 delivers in SVC mode.
Machine Tools
Single-phase 220 V AC10 models are frequently used for driving spindles on lathes and milling machines in small workshops. The frequency range up to 600 Hz enables high spindle speeds required for machining non-ferrous metals and plastics.
Comparing VEICHI AC10 with Other VEICHI Series
VEICHI manufactures several frequency converter series for different applications. The AC10 is the basic general-purpose series. For more demanding applications, the manufacturer offers more advanced solutions.
| Parameter | AC10 | AC70 | AC310 |
|---|---|---|---|
| Class | General purpose | High performance | Heavy duty |
| Power range | 0.75 -- 22 kW | 0.75 -- 400 kW | 0.75 -- 630 kW |
| Vector control | SVC | SVC / FOC | SVC / FOC with encoder |
| Built-in PLC | No | Yes | Yes |
| Analog inputs | 2 | 3 | 4 |
| Positioning | No | No | Yes |
| Price segment | Budget | Mid-range | Premium |
If scalar or basic vector control is sufficient for your application, the AC10 is the optimal choice. For machinery with high dynamic and precision requirements, consider the AC310 series. As an alternative to a VFD for simple starting tasks, a soft starter may be considered.
Installation and Wiring
The VEICHI AC10 is designed for wall mounting in a vertical position inside an electrical enclosure rated IP54 or higher. The drive enclosure itself is rated IP20, so installation without an enclosure is only possible in clean, dry environments.
Installation Requirements
- Ambient temperature: -10 to +40 degrees C (with derating up to +50 degrees C)
- Relative humidity: up to 95% non-condensing
- Altitude: up to 1,000 m above sea level (derating above this)
- Minimum clearances: 100 mm above and below for air circulation
- Vibration: up to 5.9 m/s2 (0.6g)
Wiring Diagram
Power wiring includes supply terminals (R, S, T for three-phase or R, S for single-phase), motor output terminals (U, V, W), and the ground terminal (PE). A circuit breaker of appropriate rating should be installed on the input side. Contactors or circuit breakers must not be installed between the converter and motor -- this may damage the output IGBT transistors.
The control terminal block includes: two analog inputs (AI1, AI2), one analog output (AO), six digital inputs (DI1-DI6), two relay outputs, and an RS-485 port (A+, B-). External sensor power is supplied from the built-in 10 V / 24 V source.
Commissioning and Configuration
Before initial startup, basic parameter configuration for the specific motor and application is required. Key parameters that need adjustment:
- Motor rated power, voltage, and current (P02 parameter group)
- Frequency setpoint source: keypad, analog input, or Modbus (P00.01)
- Run command source: keypad, terminals, or Modbus (P00.02)
- Acceleration and deceleration times (P00.11, P00.12)
- Upper and lower frequency limits (P00.03, P00.04)
- PID controller settings when using sensors (P09 parameter group)
A detailed guide on configuring the VEICHI AC10 for water pump operation can be found in our article on VFD setup for pumps. For compressor applications, a separate guide is available that addresses the specifics of pneumatic systems.
Warranty and Support
Our company provides telephone and email technical support for all frequency converter customers. We assist with parameter configuration, model selection for specific applications, and resolving non-standard situations during operation. Additional information on choosing between a VFD and a soft starter can be found in our FAQ article on frequency converters and soft starters.
