Medium Voltage Inverter

Medium Voltage Inverter Medium Voltage Inverter— Medium Voltage Inverter— Four-Quadrant Type 32 Success Cases

Medium Voltage Inverter MegaVert is an IGBT-type medium voltage inverter independently developed and produced by Vertiv using the world's cutting-edge power electronics technologies as a whole. Using the Sinusoidal PWM (SPWM) control technology to achieve variable frequency control on medium voltage motors, the inverter is supposed to improve the variable speed of the motors, increase the control level, device power factor and operating efficiency of medium voltage drive systems, meet the process control requirements, reduce motor energy consumption, and therefore realize energy saving and environmental...

Medium Voltage InverterGeneral-Purpose Type System Composition Transformer cabinet The input-side phase shifting transformer isolates the primary side voltage from the secondary side voltage. The phase difference between the secondary side windings is fixed to form a multi-pulse rectification mode, which enables the harmonic currents to be cancelled, thereby significantly improving the current waveform on the grid side, increasing the power factor on the grid side, and eliminating harmonic pollution of an inverter on the power grid. With a world-class cooling fan, which boasts large air volume...

Typical Topologic Structure CB3 Power unit Electric motor Medium voltage input Phase shifting transformer MMI Control unit Logic control Circuit Power supply Remote control Adapter MegaVert is a voltagesource-type medium voltage inverter with highhigh structure. The input of the inverter is directly connected to 3/6/10 kV medium voltage bus, and power units are serialized to achieve 0~3/6/10 kV harmonic-free output using the phase shifting principle. General medium voltage motors can be directly driven without any booster and filter device. System structure diagram of MegaVert medium voltage...

Perfect Output Waveform and System Efficiency The combination of high-performance parts with optimal design of MegaVert medium voltage inverter ensures a system efficiency higher than 97%. Without any compensation device, the power factor exceeds 0.96 (load > 20%). 0       50      100 Electric motor speed (%) 50      100 Electric motor speed (%) The inverter outputs approximately perfect sine waves using SPWM technology. Output waveform complies with power quality standards of GB/T 14549-93 and IEEE519-1992. Advantages of perfect sine waves: Without wave filter or power compensation device of...

Reliable Power Unit The reliable security design ensures power unit insulation from cabinets. The draw-out structure facilitates power unit draw-out from a cabinet for maintenance. (Optional) Bypass technology ensures reliability of power units. Bypass technology of power units: The bypass time of the power units reaches millisecond level, so the output fluctuation is minimized to ensure load running. Connected to output of upperlevel unit Main control system When a power unit fails, the main control system automatically detects the failure of the unit, and triggers the bypass circuit of the...

Outstanding Product Features The main control system of MegaVert medium voltage inverter is a multi-core control platform with which system performance is improved significantly. With one system DSP, one control DSP, and one FPGA, logic control is isolated from algorithm control. The core CPU is encapsulated using BGA, so the dimensions and power consumption are greatly reduced, and performance stability is improved. DSP works at 150 MHz, boasts operation capability as high as 150 MIPS, supports high-precision high-speed operation, and enables interruption at high speed. The data processing performance...

Outstanding Product Functions A Uninterrupted running in case of instantaneous power failure If the voltage of a power supply drops or is cut off within 300 ms, the inverter continues to trace the output of the motor speed to maintain that the DC bus voltage of all power units is greater than the under-voltage of the DC bus. This function ensures uninterrupted running of the inverter. Grid voltage recovery Motor speed Output voltage Output frequency Frequency adjustment Uninterrupted running in case of instantaneous power failure Function time sequence diagram B Speed tracing function In spite...

D PLC function The inverter can change the operating frequency band according to the received instruction. The acceleration and deceleration can be set for specific frequency band. The PLC mainly implements segment-based speed and time combination function. In some cases, required speed may vary with time due to process requirements. The PLC can meet this requirement. Up to 16 segments of speed can be set. E Embedded PID A PID controller is reserved in the inverter. PID parameters are settable. PID control is a common method of process control with which, the proportion, integral and differential...

User-Friendly Operation Interface The operation interface is a high-definition color LCD touchscreen with beautiful screen design and level-based menu. The language version of the interface is Simplified Chinese, and the interface shows events, alarms and fault names, operating parameters, function code names, and function parameter range. The parameter copy function is provided. 1. Show a system running diagram and I/O voltage and current of the system. 2. Show a topology and status of any module, for example, input voltage and bus voltage of a module. 3. Enable optional parts and their status...

Diversified Communication Modes and Interfaces Remote Communication MegaVert medium voltage inverter supports local control, remote control, and background control, as well as different mainstream protocols (Modbus, Profibus-DP, DeviceNet, and InterBus), and can complete remote commissioning, configuration, and monitoring, providing users with seamless soft connection during system integration. Remote status monitoring Operation management Maintenance management Remote upgrade Asset management Adapter Profibus Modbus DeviceNet Interbus ...