| Quantity: | |
|---|---|
The air compressor inverter is a special inverter tailored for various air compressors, mainly used for frequency conversion of air compressors. The inverter controls the motor speed and can instantly adjust the input voltage frequency according to the load changes, thereby maintaining the stability of parameters such as pressure, flow, and temperature, and improving the working performance of the compressor.
Working principle of air compressor inverter
The air compressor inverter controls the power control device of the AC motor by changing the frequency of the motor's working power supply. Specifically, the inverter adjusts the voltage and frequency of the output power supply through rectification, filtering, inversion and other processes, and provides the required power supply voltage according to the actual needs of the motor, thereby achieving the purpose of energy saving and speed regulation.
Product feature
1. With advanced open-loop vector control performance, good voltage and current control technology
Starting torque 0.5Hz/150% torque, speed ratio 1:100, dynamic response <20ms, steady speed accuracy ±0.2%.
2. Wide voltage range design to meet the demanding user power grid environment
The wide voltage range reaches AC 3PH:380V(-15%)~440V(+10%).
3. Built-in standard C3 filter, optional external C2 filter, better EMC performance, making the product more suitable for electromagnetic interference occasions.
4. 30KW (inclusive) and below inverter built-in braking unit.
5. The whole series is equipped with a high-performance keyboard that can copy parameters, which is convenient for customers to use and operate.
6. The product supports the common DC bus solution and supports DC power supply mode.
7. Provides a variety of braking methods for fast stopping
Including energy consumption braking, flux braking, DC braking, short-circuit braking, etc.
8. It has multiple functions such as simple water supply and instant power failure without shutdown, which can better meet various usage needs of customers.
9. The product has a semi-book structure and independent air duct design, and supports wall-mounted, flange, and floor-standing installation methods, providing customers with more reliable and economical installation and use methods.
Technical parameters
| Category | Function | Specifications |
| Power input | Inverter input voltage (V) | Three-phase 220V (-15%) ~ 240V (+10%) Rated voltage: 220V |
| Three-phase 380V (-15%) ~ 440V (+10%) Rated voltage: 380V | ||
| Three-phase 520V (-15%) ~ 690V (+10%) Rated voltage: 660V | ||
| Rated input current(A) | See Product Ratings | |
| Rated input frequency (Hz) | 50Hz or 60Hz, the allowed range is 47~63Hz | |
| Efficiency | >97% | |
| Power Output | Output voltage(V) | Equal to input voltage, error less than 5% |
| Rated output current(A) | See Product Ratings | |
| Rated output power (kW) | See Product Ratings | |
| Output frequency (Hz) | 0~400Hz | |
| Low voltage DC power output | 24 VDC power supply | 24W(Rated 24V/1A) |
| Operation control performance | Control method | Open loop vector, space voltage vector |
| Speed ratio | Asynchronous machine 1:200 (SVC), synchronous machine 1:200 (SVC) | |
| Speed control accuracy | ±0.2% (SVC) | |
| Speed Fluctuation | ±0.3% (SVC) | |
| Torque response | <20ms (SVC) | |
| Starting torque | Asynchronous motor 0.25Hz 150% (SVC) | |
| Synchronous machine 2.5Hz 150% (SVC) | ||
| Frequency setting method | PID control setting, MODBUS communication setting, P1- and P2-analog input setting, keyboard digital setting | |
| Overload capacity | 150% rated current overload for 1 minute | |
| Pressure analog input | Standard 1 channel:P1+/P1- | |
| Optional 1 way:P2+/P2- | ||
| 4~20mA/0~1.6MPa enter | ||
| Temperature analog input | Standard 1 channel:PTA1/PTB1 | |
| Optional 1 way:PTA2/PTB2 | ||
| Resolution 1ºC, range -20ºC~150ºC, accuracy error: 3ºC | ||
| Analog output | Standard 1 channel:AO1/GND | |
| 0~10V/0~20mA | ||
| Digital input | Standard 3-way:S1,S2,S3 | |
| Optional 5-way:S4,S5,S6,S7,S8 | ||
| Common terminal:COM | ||
| Maximum frequency 1kHz | ||
| Digital output | Standard 2-way:RO1A/RO1C ,RO2A/RO2B/RO2C | |
| Optional 4-way:RO3A,RO4A ,RO5A,RO6A,ROC | ||
| Contact capacity:3A/AC250V,1A/DC30V | ||
| Communications 485 | Standard 1 channel:485+/485- | |
| Shielding grounding PE/CGND | ||
| Other | Installation | Wall mounting, flange mounting |
| Operating temperature | 10~50ºC, derate when the temperature is above 40ºC, derate by 1% for every 1ºC rise | |
| Protection level | IP20 | |
| Pollution degree | Level 2 | |
| Cooling method | Forced air cooling | |
| DC Reactor | 7.5~11kW built-in optional, 15~110kW built-in standard, 132~315kW external optional | |
| EMC filters | The built-in standard C3 filter is disabled by factory default; if you need to enable it, you can manually insert the jumper cap at the socket position marked as J10. | |
| External optional filter: meets IEC61800-3 C2 level requirements |
FAQ
Q1: How do I choose the right power rating (kW or HP) for my application?
A:The VFD's power rating should match or slightly exceed the power rating of the electric motor it will control (e.g., a 7.5 kW motor requires a 7.5 kW VFD). It's crucial to consider the application's load type.
Q2: What input voltage and power supply do I need?
A: Check your facility's available power supply (e.g., 1-phase 220VAC, 3-phase 380VAC, 3-phase 480VAC) and ensure the VFD is designed for that input voltage. Also, verify that the motor's voltage rating matches the VFD's output.
Q3: Is a braking resistor necessary?
A: A braking resistor is required if your application involves frequent stopping, overhauling loads (where the load drives the motor, like in downhill conveyors or cranes lowering a load), or requires very fast deceleration times. The resistor helps dissipate the regenerated energy that flows back to the VFD.
Q4: What protection features should the VFD have?
A:Essential protection features include:
Overcurrent and Short-Circuit Protection
Overvoltage and Undervoltage Protection
Motor Overload Protection
Overtemperature Protection (for both the VFD and the motor)
Phase Loss Protection (for input and output)
The air compressor inverter is a special inverter tailored for various air compressors, mainly used for frequency conversion of air compressors. The inverter controls the motor speed and can instantly adjust the input voltage frequency according to the load changes, thereby maintaining the stability of parameters such as pressure, flow, and temperature, and improving the working performance of the compressor.
Working principle of air compressor inverter
The air compressor inverter controls the power control device of the AC motor by changing the frequency of the motor's working power supply. Specifically, the inverter adjusts the voltage and frequency of the output power supply through rectification, filtering, inversion and other processes, and provides the required power supply voltage according to the actual needs of the motor, thereby achieving the purpose of energy saving and speed regulation.
Product feature
1. With advanced open-loop vector control performance, good voltage and current control technology
Starting torque 0.5Hz/150% torque, speed ratio 1:100, dynamic response <20ms, steady speed accuracy ±0.2%.
2. Wide voltage range design to meet the demanding user power grid environment
The wide voltage range reaches AC 3PH:380V(-15%)~440V(+10%).
3. Built-in standard C3 filter, optional external C2 filter, better EMC performance, making the product more suitable for electromagnetic interference occasions.
4. 30KW (inclusive) and below inverter built-in braking unit.
5. The whole series is equipped with a high-performance keyboard that can copy parameters, which is convenient for customers to use and operate.
6. The product supports the common DC bus solution and supports DC power supply mode.
7. Provides a variety of braking methods for fast stopping
Including energy consumption braking, flux braking, DC braking, short-circuit braking, etc.
8. It has multiple functions such as simple water supply and instant power failure without shutdown, which can better meet various usage needs of customers.
9. The product has a semi-book structure and independent air duct design, and supports wall-mounted, flange, and floor-standing installation methods, providing customers with more reliable and economical installation and use methods.
Technical parameters
| Category | Function | Specifications |
| Power input | Inverter input voltage (V) | Three-phase 220V (-15%) ~ 240V (+10%) Rated voltage: 220V |
| Three-phase 380V (-15%) ~ 440V (+10%) Rated voltage: 380V | ||
| Three-phase 520V (-15%) ~ 690V (+10%) Rated voltage: 660V | ||
| Rated input current(A) | See Product Ratings | |
| Rated input frequency (Hz) | 50Hz or 60Hz, the allowed range is 47~63Hz | |
| Efficiency | >97% | |
| Power Output | Output voltage(V) | Equal to input voltage, error less than 5% |
| Rated output current(A) | See Product Ratings | |
| Rated output power (kW) | See Product Ratings | |
| Output frequency (Hz) | 0~400Hz | |
| Low voltage DC power output | 24 VDC power supply | 24W(Rated 24V/1A) |
| Operation control performance | Control method | Open loop vector, space voltage vector |
| Speed ratio | Asynchronous machine 1:200 (SVC), synchronous machine 1:200 (SVC) | |
| Speed control accuracy | ±0.2% (SVC) | |
| Speed Fluctuation | ±0.3% (SVC) | |
| Torque response | <20ms (SVC) | |
| Starting torque | Asynchronous motor 0.25Hz 150% (SVC) | |
| Synchronous machine 2.5Hz 150% (SVC) | ||
| Frequency setting method | PID control setting, MODBUS communication setting, P1- and P2-analog input setting, keyboard digital setting | |
| Overload capacity | 150% rated current overload for 1 minute | |
| Pressure analog input | Standard 1 channel:P1+/P1- | |
| Optional 1 way:P2+/P2- | ||
| 4~20mA/0~1.6MPa enter | ||
| Temperature analog input | Standard 1 channel:PTA1/PTB1 | |
| Optional 1 way:PTA2/PTB2 | ||
| Resolution 1ºC, range -20ºC~150ºC, accuracy error: 3ºC | ||
| Analog output | Standard 1 channel:AO1/GND | |
| 0~10V/0~20mA | ||
| Digital input | Standard 3-way:S1,S2,S3 | |
| Optional 5-way:S4,S5,S6,S7,S8 | ||
| Common terminal:COM | ||
| Maximum frequency 1kHz | ||
| Digital output | Standard 2-way:RO1A/RO1C ,RO2A/RO2B/RO2C | |
| Optional 4-way:RO3A,RO4A ,RO5A,RO6A,ROC | ||
| Contact capacity:3A/AC250V,1A/DC30V | ||
| Communications 485 | Standard 1 channel:485+/485- | |
| Shielding grounding PE/CGND | ||
| Other | Installation | Wall mounting, flange mounting |
| Operating temperature | 10~50ºC, derate when the temperature is above 40ºC, derate by 1% for every 1ºC rise | |
| Protection level | IP20 | |
| Pollution degree | Level 2 | |
| Cooling method | Forced air cooling | |
| DC Reactor | 7.5~11kW built-in optional, 15~110kW built-in standard, 132~315kW external optional | |
| EMC filters | The built-in standard C3 filter is disabled by factory default; if you need to enable it, you can manually insert the jumper cap at the socket position marked as J10. | |
| External optional filter: meets IEC61800-3 C2 level requirements |
FAQ
Q1: How do I choose the right power rating (kW or HP) for my application?
A:The VFD's power rating should match or slightly exceed the power rating of the electric motor it will control (e.g., a 7.5 kW motor requires a 7.5 kW VFD). It's crucial to consider the application's load type.
Q2: What input voltage and power supply do I need?
A: Check your facility's available power supply (e.g., 1-phase 220VAC, 3-phase 380VAC, 3-phase 480VAC) and ensure the VFD is designed for that input voltage. Also, verify that the motor's voltage rating matches the VFD's output.
Q3: Is a braking resistor necessary?
A: A braking resistor is required if your application involves frequent stopping, overhauling loads (where the load drives the motor, like in downhill conveyors or cranes lowering a load), or requires very fast deceleration times. The resistor helps dissipate the regenerated energy that flows back to the VFD.
Q4: What protection features should the VFD have?
A:Essential protection features include:
Overcurrent and Short-Circuit Protection
Overvoltage and Undervoltage Protection
Motor Overload Protection
Overtemperature Protection (for both the VFD and the motor)
Phase Loss Protection (for input and output)
