Product Introduction

LDZ14501001.140 power unit is a high-performance power unit of SIEMENS Robincon series. The following is a detailed introduction to it:
The power unit LDZ14501001.140 of SIEMENS Robincon series has the following functions:
High efficiency and energy saving: using advanced power electronics technology and control algorithms to improve energy utilization efficiency and reduce energy consumption.

Stable and reliable: reasonable structural design, high-quality materials for components to ensure the stability and reliability of the power unit in long-term operation.

Precise control: through precise control algorithms and sensor technology, precise control of the motor is achieved to improve the operating efficiency and stability of the system.

Protection function: with multiple protection functions such as overcurrent, overvoltage, short circuit, etc., to ensure the safe and stable operation of the system.

Easy to maintain: the design of the power unit is easy to maintain and replace, reducing maintenance costs and time.

Adapt to grid requirements: the grid voltage can drop to 55%, and the inverter can continue to work without tripping.

High input power factor: The input power factor is greater than 0.95 and is almost unchanged in the entire range.

High protection level: The protection level is high IP31, which is higher than the ordinary IP20, and has low environmental requirements for users.

Unique center point drift technology: It realizes that the high-voltage inverter maintains a large output effective voltage after one or more units fail, and adjusts the three-phase output line voltage balance.

Dual-frequency braking technology: greatly improves the braking torque of the voltage source transformer.

Online monitoring function of the motor parameter automatic detection and monitoring machine: It can automatically detect motor parameters and monitor online.

Main use
The LDZ14501001.140 power unit is suitable for a variety of occasions requiring high-voltage variable frequency speed regulation due to its high efficiency, energy saving and powerful functions. These occasions include but are not limited to:

Industrial automation: In various automation equipment on the production line, such as robots, conveyor belts, processing machine tools, etc., this power unit can accurately control the operation of the motor, thereby improving production efficiency and product quality, reducing energy consumption and maintenance costs.
Power system: used in power regulation equipment to achieve precise control and distribution of electric energy. In terms of voltage stability and reactive power compensation of the power grid, the power unit can monitor the state of the power grid in real time and respond quickly to abnormal situations, protect power equipment from damage, and improve the stability and reliability of the power grid.
New energy power generation: In the wind power generation system, the power unit can convert the AC power generated by the wind turbine into DC power, and convert it into AC power that meets the requirements of the power grid through the inverter and send it to the power grid. In the solar power generation system, it can boost and invert the DC power generated by the solar panel to meet the access requirements of the power grid.
Other industries: It is also suitable for those occasions where the voltage and power quota requirements vary widely, such as oil, natural gas, water, shipbuilding and papermaking industries. In these industries, the power unit plays the role of a generalist, improving productivity, enhancing energy utilization and reducing operating costs.
Technical features
Structure: Each power unit is completely consistent in structure and can be interchanged. It is a basic AC-DC-AC single-phase inverter circuit.
Rectification: The rectifier side uses six diodes to achieve three-phase full-wave rectification.
Inversion: The required waveform can be obtained by performing sinusoidal PWM control on the IGBT inverter bridge.
Output side structure: The output side is connected in series by the U and V output terminals of each unit to form a star connection to power the motor. By reorganizing the PWM waveform of each unit, a step PWM waveform can be obtained. This waveform has good sinusoidality and small dv/dt, which can reduce insulation damage to cables and motors. No output filter is required. The output cable length can reach 1000 meters. The motor does not need to be derated and can be directly used for the transformation of old equipment.
Controller: The controller and each unit control board use 32-bit DSP, large-scale integrated circuits and surface welding technology, and the system has high performance.
Communication technology: Multi-channel optical fiber communication technology is used between the controller and the power unit. The low-voltage part and the high-voltage part are completely and reliably isolated. The system has high safety and good anti-electromagnetic interference performance.
Fault handling: During the operation of the high-voltage inverter, when one of the units fails, it can be temporarily bypassed and derated due to the unit bypass function. At the same time, the "star point drift" function enables the high-voltage inverter to maintain a large output effective voltage after one or more units fail, and adjusts the three-phase output line voltage balance to ensure the continuous and safe operation of the inverter.
3. Summary

The LDZ14501001.140 power unit has become an ideal choice for industrial automation, power systems, new energy generation and other high-demand occasions with its excellent performance and wide application fields. When using it, please pay attention to the product's use environment, installation and commissioning requirements, and maintenance to ensure its long-term stable operation.

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