RTK REGELTECHNIK motor, German RTK REGELTECHNIK model, RTK REGELTECHNIK price

RTK REGELTECHNIK motor is a commonly used AC motor. The synchronous motor is the heart of the power system; it is a component that integrates rotation and stationary parts, electromagnetic changes and mechanical motion, to realize the conversion between electrical energy and mechanical energy. Its dynamic performance is very complex, and its dynamic performance has a great impact on the dynamic performance of the entire power system. The characteristic is: during steady-state operation, there is an invariant relationship between the rotor speed and the grid frequency: n=ns=60f/p, where f is the grid frequency, p is the number of pole pairs of the motor, and ns is called the synchronous speed. If the grid frequency remains unchanged, the speed of the synchronous motor in steady state is always constant and independent of the load magnitude. Synchronous motors are divided into synchronous generators and synchronous motors. AC machines in modern power plants are mainly synchronous generators.

RTK REGELTECHNIK motor structure

The motor can be regarded as a DC motor in which mechanical commutation is replaced by an electronic commutation device. It mainly consists of the synchronous motor body, a power electronic inverter, a rotor position detector, and a controller. Among them, the rotor of the synchronous motor is mainly composed of permanent magnets and magnetic conductors. The permanent magnet brushless DC motor mainly consists of the permanent magnet motor body, a rotor position sensor, and an electronic commutation circuit. In terms of both structure and control method, the permanent magnet brushless DC motor has many similarities with traditional DC motors: the rotor equipped with permanent magnets replaces the stator poles of the brushed DC motor; the stator with multi-phase windings replaces the armature; and the electronic commutator composed of a solid-state inverter and a shaft position detector replaces the mechanical commutator and brushes.

RTK REGELTECHNIK motor advantages

The motor operates in a self-controlled manner, so it does not require additional starting windings on the rotor like a synchronous motor under heavy-load start-up with variable frequency speed control, nor does it produce oscillation and step-out when the load changes suddenly. For small and medium-capacity brushless DC motors, the permanent magnets mostly use rare-earth neodymium-iron-boron (Nd-Fe-B) materials with high magnetic energy product. Therefore, the volume of rare-earth permanent magnet brushless motors is reduced by one frame size compared to three-phase asynchronous motors of the same capacity. Over the past thirty years, research on variable frequency speed control for asynchronous motors has ultimately been seeking methods to control asynchronous motor torque. Rare-earth permanent magnet brushless DC motors will surely show advantages in the field of speed control due to their wide speed regulation range, small volume, high efficiency, and small steady-state speed error. Because brushless DC motors have the characteristics of DC brushed motors and are also devices with variable frequency, they are also known as DC variable frequency; the internationally common term is BLDC. The operating efficiency, low-speed torque, and speed accuracy of brushless DC motors are better than inverters using any other control technology, making them worthy of industry attention. Products have been produced exceeding 55kW, and can be designed up to 400kW, meeting the industry's needs for power saving and high-performance drive.

RTK REGELTECHNIK motor speed control

Motor speed control: Pole-changing speed control achieves speed regulation by changing the wiring method of the stator windings to alter the number of stator pole pairs of the squirrel-cage motor. The characteristics are as follows: 1, it has relatively stiff mechanical characteristics and good stability; 2, there is no slip loss, resulting in high efficiency; 3, the wiring is simple, control is convenient, and the price is low; 4, it provides stepped speed control with large step differences, so smooth speed control cannot be achieved; 5, it can be used in combination with voltage-regulating speed control and electromagnetic slip clutches to obtain smooth speed control characteristics with higher efficiency. This method is suitable for production machinery that does not require stepless speed control, such as metal cutting machine tools, elevators, lifting equipment, fans, and water pumps. Variable frequency speed control is a speed regulation method that changes the synchronous speed by altering the frequency of the motor's stator power supply. The main equipment in a variable frequency speed control system is the inverter that provides variable frequency power. Inverters can be divided into two categories: AC-DC-AC inverters and AC-AC inverters; AC-DC-AC inverters are mostly used domestically. Its characteristics: 1, high efficiency, with no additional losses during the speed control process; 2, wide range of applications, suitable for squirrel-cage asynchronous motors; 3, wide speed regulation range, stiff characteristics, and high precision; 4, complex technology, high cost, and difficult maintenance and repair. 5, this method is suitable for occasions requiring high precision and good speed control performance. Cascade speed control refers to inserting an adjustable additional electromotive force into the rotor circuit of a wound-rotor motor to change the motor's slip, thereby achieving speed control. Most of the slip power is absorbed by the inserted additional electromotive force, and then additional devices are used to return the absorbed slip power to the grid or convert the energy for utilization. According to the method of absorbing and utilizing slip power, cascade speed control can be divided into motor cascade speed control, mechanical cascade speed control, and thyristor cascade speed control, with thyristor cascade speed control being mostly adopted. Its characteristics are: 1, the slip loss during the speed control process can be fed back to the grid or production machinery, resulting in higher efficiency; 2, the device capacity is proportional to the speed regulation range, saving investment, and it is suitable for production machinery with a speed regulation range of 70%－90% of the rated speed; 3, in case of failure of the speed control device, it can switch to full-speed operation to avoid production stoppage; 4, the power factor of thyristor cascade speed control is low, and harmonic influence is significant. 5, this method is suitable for use on fans, water pumps, steel rolling mills, mine hoists, and extruders.

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