What is the role of DDS in the inverter

DDS is an abbreviation for Direct Digital Synthesizer. Compared with traditional frequency synthesizers, DDS has the advantages of low cost, low power consumption, high resolution and fast conversion time, and is widely used in the field of telecommunications and electronic instruments, which is a key technology to realize the full digitalization of equipment.

DDS, like DSP (Digital Signal Processing), is a key digital technology. DDS is an abbreviation for Direct Digital Synthesizer. Compared with traditional frequency synthesizers, DDS has the advantages of low cost, low power consumption, high resolution and fast conversion time, and is widely used in the field of telecommunications and electronic instruments, which is a key technology to realize the full digitalization of equipment.

The DDS chip mainly includes three parts: frequency control register, high-speed phase accumulator and sinusoidal calculator (such as Q2220). The frequency control register can load and register the frequency control code entered by the user in serial or parallel mode; And phase.

The frequency control code is phase accumulated in each clock cycle to obtain a phase value. The sine calculator calculates the digitized sine wave amplitude for this phase value (the chip is usually obtained by looking up a table). The output of the DDS chip is generally a digital sine wave, so it also needs to go through a high-speed D A converter and a low-pass filter to obtain a usable analog frequency signal.

DD is the abbreviation of DirectDriver, and the addition of a variable frequency motor is called a direct drive variable frequency motor.

Due to its large output torque, some companies refer to this product directly as a torque servo. Different from traditional motors, the high torque of this product allows it to be directly connected with the motion device, thus eliminating the need for connection mechanisms such as reducers, gearboxes, pulleys, etc., so it is called a direct drive motor.

Generally, this type of motor is equipped with a high-resolution encoder, so that this product can achieve an accuracy one level higher than that of ordinary servo. And because of the use of direct connection, the positioning error caused by the mechanical structure is reduced, so that the process accuracy can be guaranteed. In addition, for some camshaft control methods, on the one hand, the dimensional error caused by the friction of the mechanical structure is reduced, and on the other hand, the noise during installation and use is also reduced a lot.

With the different actual working conditions of the motor, the motor achieves the purpose of energy saving through frequency conversion speed regulation.

DD direct drive inverter motor is used in washing machines, breaking the conventional power consumption of drum washing machines compared with wave wheel washing machines, DD direct drive technology has changed the previous operation mode of using belts as a medium, and is directly driven by motors. The motor efficiency reaches 16 times that of the traditional motor, and the energy saving is about 35%, so that the drum washing machine is not inferior to the wave wheel washing machine in terms of energy consumption. At the same time, DD direct drive technology also solves the problem of high vibration and high noise of drum washing machines.

The so-called d d is the English abbreviation of DC. This is also known as DC inverter. In fact, this statement is inaccurate, DC has no frequency at all, how can it be said that frequency conversion? It's just called like this, DC only plays an excitation and intermediate role, and it still changes to alternating current.

That is, DDM motor, DDM in the washing machine means washing drive motor, is a direct drive motor with frequency conversion. The full name of DD motor is Direct Drive, which means that the direct drive motor has canceled the belt, of course, its reliability and noise have been improved a lot. However, the speed regulation actually adopts frequency conversion technology, which can save energy and be green at the same time.

DDM frequency conversion technology is mainly to enhance energy efficiency, and adjust the washing intensity according to the user's washing needs, a total of strong, strong, medium and weak, four gears can be adjusted, not only improve the cleaning effect of clothes, but also the cleaning range is more uniform, there will be no leakage, or unclean places.

It is a technology applied to washing machines that directly drives inverter motors without belts.

Explanation: DDM frequency conversion technology is mainly to enhance energy efficiency, and adjust the washing intensity according to the user's washing needs, a total of strong, strong, medium and weak, four gears can be adjusted, not only improve the cleaning effect of clothes, but also the cleaning range is more uniform, there will be no leakage, or unclean places.

Introduction: Inverter washing machine is a washing machine that widely applies inverter technology. It mainly means that the main motor of the washing machine is a brushless DC motor driven by variable frequency.

The key technology of inverter washing machine includes two aspects, these two technologies were applied to washing machines in the mid-90s of the last century, one is motor technology, especially DC brushless motor manufacturing technology; The second is the control and drive technology of the motor.

DC excitation frequency conversion motor, DC only plays an excitation and auxiliary role, and the frequency conversion is still alternating current.

DD frequency conversion is a DC frequency conversion motor.

Direct drive motor, short for direct drive motor. It mainly refers to the fact that the motor does not need to go through the transmission device (such as the transmission belt, etc.) when driving the loadThe most common application related to life is the washing machine, that is, the washing machine does not use a belt connection between the roller and the drive motor, which has been widely promoted by major washing machine manufacturers as a new technology (or a new concept) in recent years.

The main benefit of a direct drive motor is mainly to avoid the use of transmission equipment such as transmission belts, which are precisely the components in the system that have a higher failure rate. Therefore, systems that use direct drive motors should technically have a lower failure rate.