Abstract: Overview of frequency converter production at home and abroad, introduction to the Heping vector frequency converter series, product technical characteristics, product technical features, main applications, complete fault alarms, system configuration information, and external connection wiring.
1. Overview of Frequency Converter Production
Currently, there are over 200 domestic manufacturers producing low-voltage frequency converters (380V, 400V) and over 50 manufacturers producing high-voltage frequency converters (3kV, 6kV, 10kV). Adding to this, there are 50 importers and approximately 15 from Taiwan, totaling over 315 products circulating in the market. The market is truly thriving with a wide variety of brands and products! In terms of control methods, most domestic manufacturers primarily use voltage/frequency ratio control (V/f=C) and space voltage vector control (SVPWM). In the past five years, vector control (VC) and sensorless vector control have emerged, but their proportion is small, with approximately 40 manufacturers already supplying these technologies. However, vector control is only basic; high-end, high-performance products are almost nonexistent. Our company, targeting high-end vector control products to meet market needs, has successfully completed trial production after two years of effort and is preparing for mass production, filling a market gap. We are leading the way domestically and are rare even internationally. We welcome your interest; truly, "you won't know until you compare, and the truth will be revealed after use." We eagerly await your arrival.
2. Product Series Introduction
1) The HPVFV vector inverter uses a 32-bit DSP chip, which is suitable for high-end and complex application environments and can meet the precise speed regulation requirements of various occasions.
Voltage 220V~460V; Power 5.5~400kW
2) HPVFE economic frequency converters are suitable for simple speed regulation applications, enabling the motor input voltage to match the load and maximizing energy savings.
Voltage 220V~480V; Power 0.32~15kW
3) HPVFQ four-quadrant frequency converters can meet the speed regulation or energy saving of various potential loads. They can feed back the regenerative energy of motors to the power grid, with low harmonic pollution to the power grid and a power factor close to 1. They are truly green frequency converters and are especially suitable for elevators, hoists, conveyor belts, various cranes, oilfield pumping machines, mine hoists, locomotive traction, etc.
Voltage 220V~460V; Power 5.5~400kW
4) The HPVFS explosion-proof and intrinsically safe frequency converter combines frequency conversion, vector control, explosion-proof and intrinsically safe technologies, and can provide four-quadrant energy feedback, resulting in significant energy saving. It is suitable for use in underground coal mines, open-pit mines, coal preparation plants, special hazardous sites, and harsh environments.
Voltage: 660V~1140V; Power: 5.5~630kW
3. Product Technical Characteristics
1) The technical specifications of the Peace Vector Control Frequency Converter, a high-end, multi-functional inverter, are as follows:
Multiple control modes in one machine – it has four modes: V/f control, sensorless vector control, vector control, and four-quadrant inverter regenerative feedback control, which can be selected arbitrarily according to requirements.
2) It has low-speed high torque output - when V/f control is used, it can have 150%-200%Te (rated torque) at 0.5Hz, and when vector control is used, it can have 150%-200%Te (rated torque) at 0Hz.
3) It has a self-learning function—providing the most ideal control parameter settings.
4) It has free programming capabilities—multiple digital equations, multiple logical equations, and communication with the bus can realize arbitrary programming combinations and define well-defined functions.
5) It has the control function of multiple drives and multiple motors - synchronous control of multiple drives, parallel operation of PWM inverter regeneration units, and control of multiple motors.
6) Improved fault handling function - real-time data recording of voltage, current, frequency, input power, temperature, etc. 1 second before the fault occurs.
7) It has built-in PLC and PID functions (with compensation function, applicable to tension control of winding machines).
8) Devices with RS485/232, Profibus, and CAN communication connections.
9) It has six control modes: V/f frequency control, V/f speed control, vector speed control, vector torque control, vector control, and sensorless vector control, as well as four-quadrant inverter regenerative feedback and DC bus power supply multi-unit operation mode.
10) The entire machine software is divided into 24 segments, with a total of 650 instructions. That is, the CPU software is complex, only in this way can it meet all the functions in 9). Compared with the TP-2000 produced in Germany in 2005, which had 350 instructions and 3 control modes, it has almost doubled (this manual has been technically verified by me).
4. Main advantages and features of the product
1) Vector control, with multiple control modes available (generally only single vector control).
2) It can operate in four quadrants and is suitable for various potential loads.
3) The output harmonics are low and the current is sinusoidal.
4) There is no short-circuit current after power failure.
5) Input line voltage fluctuation compensation (AVR).
6) Power factor cosΦ≈1.
7) High precision and diverse functions, suitable for various types of loads, realizing one machine for multiple uses.
8) It has complete protection devices and is safe and reliable.
5. Product Technical Features
1) High speed regulation accuracy, up to ±0.1% (up to 0.01% with an encoder).
2) Acceleration and deceleration times can be as long as 3000 seconds.
3) Input voltage 220~480V, with mining-grade 660~1140V available (other types are almost nonexistent).
4) Motor parameters can be automatically identified and compensated online (this is required for high-precision control, and is available from Fuji Electric in Japan).
5) The carrier frequency can automatically decrease. When the IGBT overheats due to overcurrent during use, it will automatically decrease. The factory default value is 2.5kHz, and the adjustable range is from 0.8 to 10kHz to ensure safety.
6) Can have multiple speeds up to 8 stages.
7) The V/f characteristic has three settings: linear, square, or arbitrary.
8) Energy saving effect: The V/f characteristic is automatically adjusted according to the motor load to reduce the output voltage and maximize energy saving.
6. Main Uses of the Product
1) General equipment (water pumps, fans, air compressors, central air conditioning - cooling pumps, refrigeration pumps, compressors, etc.).
2) DC power supply device.
3) Multi-motor drive device.
4) Transport and loading/unloading cranes (lower conveyor belts, hoists, cages, cranes, gantry cranes, locks, elevators, wire drawing machines, winding machines, etc.).
5) Machinery with large load inertia (extruders, granulators, large fans and water pumps, centrifuges, centrifuges, mixers, cleaning machines, etc.).
6) Winding machine (paper, cable, film winding, rope, round steel, steel strip, etc.).
In short, it is applicable to almost all types of loads, is a top-of-the-line full-function product, and is the only one of its kind in the country, placing it in a leading position. It truly is a case of "one machine in hand, no worries about anything, diverse functions, flexible application, safe and reliable, and excellent results."
7 Fault Alarm
8 System Composition Information
Figure 1 is a block diagram of the HPVFV frequency converter. The diode bridge rectifies the three-phase power supply to provide DC power to the frequency converter. The inverter unit, composed of IGBTs, generates a three-phase symmetrical AC voltage.
The motor control module is based on microprocessor software. The microprocessor controls the motor according to the type of program (V/F, vector) built into the flash memory, the measured signals, the control input/output modules, and the parameter values and commands set on the operation panel. It also calculates the IGBT switching position, and the gate driver amplifies the signals to drive the IGBTs. If an IGBT overcurrent occurs, the gate driver suspends the IGBT gate signal output and sends a fault signal to the microprocessor. The operation panel serves as the connection between the user and the HPVFV inverter. The user can use a keyboard or PC to set parameter values, read and write data, and issue control commands. The keyboard is detachable and can also be connected to the HPVFV inverter via a cable. For braking resistor specifications, please refer to the braking resistor selection table attached to this manual. (Appendix 1: Reference for Braking Resistor Calculation Method)
Figure 1 Block diagram of HPV FV frequency converter
9. Wiring (wiring diagram)
Figure 2 Standard wiring diagram of HPVFV inverter frame A1
10 Conclusions
Through the above analysis, we have gained a comprehensive and systematic understanding of the Heping vector control frequency converter. It is indeed a high-end, super, multi-functional, and multi-purpose vector control frequency converter, unlike ordinary products. Compared with domestic and foreign counterparts, it is truly a step ahead in China and is rarely seen abroad.
