spwm inverter

the stepper motor two-phase lead to the double-trace oscilloscope input, and then find a motor with a rotating shaft (I am using a hand drill to clamp the motor shaft, my hand drill can be positive and negative). To maintain a stable speed, you will see the above image on the oscilloscope: two-way fixed perfect sine wave, when the speed increases when the amplitude and frequency changes (linear relationship), and positive and reverse two sinusoidal phase position is different, if you can determ

Q: What is the difference between a frequency conversion power supply and a frequency converter? I believe everyone has many questions. I only know that the frequency conversion power supply is not the same product as the frequency converter, but I don't know much about it, some friends may know that the inverter is used for speed control, while the inverter is used to simulate power usage in factories. Thi

I have talked about the principle of variable frequency power supply before, but many users and enterprises still do not know it, and do not pay much attention to the normal maintenance and maintenance of Variable Frequency Power Supply in Hong Kong. When using the Frequency Conversion Power Supply in different seasons, the single-phase and Three-Phase Frequency Conversion Power Supply in Hong Kong must also pay attention to some problems in different environments, such as heat dissipation and

The inverter is mainly composed of rectifying (AC to DC), filtering, rerectifying (DC to AC), braking unit, driving unit, and detection unit micro-processing unit. 1. Why can the rotation speed of the motor be freely changed? * 1: r/minMotor rotation speed unit: number of rotations per minute, which can also be expressed as RPM.Example: 2 pole motor 50Hz 3000 [r/min]4 pole motor 50Hz 1500 [r/min]　　　　 Conclusion: The motor rotation speed is proportiona

Since the launch of the 12th Five-Year Plan, energy conservation and emission reduction have become the key to the development of various industries. The application of various energy conservation and environmental protection products is more extensive and the prospects are clearer. As an important equipment in the field of Variable Frequency Speed Regulation, the inverter industry has huge market potential in the next few years. In large-scale distri

To sum up one sentence: the covariant allows a coarse-grained interface (or delegate) to receive a more specific interface (or delegate) as a parameter (or return value); the inverter allows an interface (or delegate) the parameter type (or return value) of is more specific, that is, the parameter type is stronger and clearer. Usually, the covariant type parameter can be used as the delegate return type, while the

C #4.0 new features (3): Variable Variance (inverter and covariant ), To sum up one sentence: the covariant allows a coarse-grained interface (or delegate) to receive a more specific interface (or delegate) as a parameter (or return value); the inverter allows an interface (or delegate) the parameter type (or return value) of is more specific, that is, the parameter type is stronger and clearer. Usually, th

Ten minutes may be suspected of winning favor. I wrote this blog and talked about it for half a day. I checked a lot of information to complete it. Therefore, it may take a little longer to understand the essence of covariant inverter. --------------------------------------------------------------------------------In many articles, the change description is roughly as follows:A type with a high degree of refinement is assigned to a type with a low deg

[C #] talking about covariant and inverter, Although I have read several blogs about covariant and inverter, they are all correct, but I feel that they are not clear-cut and have no key points.So I also try to talk about covariant and inverter from my perspective. What is covariant and inverter? MSDN explanation:Https:

The coordination and inverter should start with Object-oriented Inheritance. The inheritance relationship refers to the relationship between the Child class and the parent class. The Child class inherits from the parent class, so the child class instance is also the parent class instance. For example, Animal is a parent class, and Dog is a subclass inherited from Animal. If an object type is Dog, it must be Animal. The Inter-variant inversion is a tr

Inverter and collaborative changeInverter and covariant are not clear. Collect them first to facilitate later learning. Explanation of inverter and covariant Contravariant and covariant are new concepts in C #4. Many books and blogs have explained them. I don't think I have made them clear and understood them, you can more accurately define generic delegation and interfaces. Here I try to draw a picture to

View Original text on the Internet 1. What are changes and inverters? Assume that TSub is a subclass of TParent.Covariant: If a generic interface IFoo Inverter: If a generic interface IFoo 2. Why is there a need for covariant and inverter? Generally, only objects with inheritance relationships can undergo implicit type conversion, such as Base B = new sub ().Covariant and

In the object-oriented design, we have always pursued a kind of result, that is, good reusability. Based on this concept, the object-oriented design includes covariance and contravariance) here are two concepts. Introduction: Covariant: changes from subclass to parent class, marked with the out keywordInvert: changes from parent class to subclass, with the in keyword For example, animal is a parent class, and dog is a subclass inherited from animal. If an object type is dog, it must be animal.

C # inverter and covariant, This article uses many delegate and Lambda expressions. If you are not familiar with these expressions, please refer to my articles "delegation and anonymous delegation" and "anonymous delegation and Lambda expressions" to help you build a complete knowledge system. In the process from C #'s birth to its growth, new knowledge points are constantly introduced. Inverter and covaria

[C #] talking about covariant and InverterWhat are the terms of the covariant and inverter covariant and the inverter? The former refers to a type that can be derived to a lower degree (not specific) than the original specified derivative type, the latter refers to a type that can be derived more (more specific) than the original specified derivative type. Generic Type parameters support covariant and

Inverter power supply has been very widely used in various industries, inverter power supply inside the core components have a lot, IGBT module is the most important part of the inverter power supply, in the inverter power supply plays a very important role. Today, it is said that IGBT in the

C # inverter, In many. net books have seen the concept of inverter and collaborative change, and I also searched for some explanations about these two concepts on the Internet, but I have been feeling like I understand them, until recently I encountered a problem in the project, the inverter was used, and the understanding of the

There are four classes. =; This assignment is certainly okay, but it's justPolymorphism. The general meaning of the variant is: there are two types of T and U, and T = U (here the equal sign isAssignmentIf T and U get t' and U' after some operation, and T' = U' is also trueOperationIs a covariant. If U' = t', this operation is called an inverter. T = ↓Operation(T) = Operation(U);T = U;= Operation2(T);I. Special covariant-array We ofte

The output capacity of UPS refers to the product of the valid value U of the output voltage and the valid value I of the output current. Power Factor cos Phi refers to the ratio of active power P output by UPS to nominal view in power S, which can be expressed as cos Phi = P/S. Cos Phi is generally 0.8, UPS requires at least 0.8 of the load power factor, of course, the higher the power factor, the better, too low, it is too waste. When the power factor is 0.8, the angle between the voltage and t

The coordination and inverter should start with Object-oriented Inheritance. The inheritance relationship refers to the relationship between the Child class and the parent class. The Child class inherits from the parent class, so the child class instance is also the parent class instance. For example, Animal is a parent class, and Dog is a subclass inherited from Animal. If an object type is Dog, it must be Animal.It is the inheritance relationship us