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Introduction to sine wave control of brushless DC motor
The sine wave control of brushless DC motor is to apply a certain voltage to the motor winding to make the motor winding produce sinusoidal current, and cont...
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Introduction of trapezoidal control and FOC control mode in brushless DC motor
There are generally two types of brushless DC motor, including Hall effect sensor driven structure and sensorless structure. Although more complex, a sensor...
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The target is that the revenue will exceed 250 billion yuan in 2025! Shenzhen‘s...
A double pass band filter consisting of two H-resonators in edge coupling mode is designed. A dual frequency resonator is formed by bridging a microstrip li...
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EMC Design Skills for Implementing PSR Power Supply Design with "One Point Groun...
Let‘s talk about PCBLAYOUT: As we all know, EMC pays attention to the ground wire routing after all. For the primary ground wire of PSR, it can be divided ...
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Protection circuit principle of power amplifier loudspeaker
The principle block diagram of power amplifier loudspeaker protection circuit is shown in Figure 1, which includes three protection methods. Circuit diagram...
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How to Select DC/DC Module Power Supply Correctly and Reasonably
How to select the DC/DC module power supply correctly and reasonably? The author will talk about this problem from the perspective of DC/DC module power sup...
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Main sources of EMI of Class D power amplifier IC
Class D power amplifier IC has been plagued by EMI. The main sources of EMI are: 1. High frequency energy released by output square wave during high low swi...
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Introduction of three types of bi-directional level conversion chips
In today‘s hardware design, we will use many devices, and we often need to connect different devices. If the interface between devices and the voltage of t...
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Understand FOC and its working principle
FOC is a term in the electromechanical field, which is called field oriented control in full. It is a control technology applied to motors. Through this tec...
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Design of High Fidelity Headset Amplifier Based on SRPP Circuit of Electron Tube
In the high fidelity audio circuit, the electronic tube amplifier has been loved and concerned by the vast number of audio enthusiasts because of its unique...
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How to solve the problem of inverter capacity
Since the switching device of the frequency converter is a high-power transistor, and its over-current capacity is smaller than that of the thyristor, the c...
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Common sense of current harmonics
Introduce the common sense about harmonics, hoping to be helpful to readers What are harmonics? We know that the load connected to the power grid can be...
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Differential driver for high-speed ADC
At present, many high-performance ADC designs use differential input. The fully differential ADC design has the advantages of excellent common mode rejectio...
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Current sharing technology
There are 6 current sharing technologies we often use, namely: 1. Method of changing unit output internal resistance (slope control method); There a...
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Use standard voltage regulator to generate extremely low voltage
"For many years, the linear regulator and switching regulator have used a feedback voltage of about 1.2 V. This voltage is generated by the bandgap circuit ...
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Decrypting the four techniques of super sensitive touch IC chip
When the OS system, UI interface and machine appearance are similar, repeated and similar, for many high-end models, implementing different functions on the...
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The Noise Source of Low Dropout LDO Regulator
Why noise sources are important The importance of noise depends on its influence on the operation of the target circuit. For example, a switching po...
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Brushless DC Motor for Industrial Automation
Industrial or factory automation is one of the fastest growing terminal applications of BLDC motors in the industrial subdivision field. As factories turn f...
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Detailed explanation of common mode filter noise reduction
In order to use one of the noise reduction countermeasures of inductance, this paper will introduce the content of noise reduction of common mode filter. St...
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High brightness LED driving power supply without electrolytic capacitor
This scheme takes prolonging the service life of the circuit as the theme, combines the advantages of switching power supply and linear power supply, and ta...
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