Individual MCU can realize control of much electric machinery! The 4 electric machinery that are based on RX72T control give typical examples
[introduction] as MCU function and function rise, from odd electric machinery / odd MCU arrives much electric machinery / odd MCU undertakes controlling, of the miniaturization that implemented a system and systematic cost reduce. Wait for a domain in washing machine and air conditioning especially, this kind of trend is very clear, now almost all products are control of much electric machinery. This period use the introduction but RX72T of pilot of much electric machinery is right 4 electric machinery undertake pilot demonstrates.
Cypress Qi straight person
Sr Staff Product Marketing Specialist
Different electric machinery controls fashion, the processing performance that MCU place requires and functional resource are different also. This period demonstrated to use control without sensor vector. Having sensor vector to control is a kind efficient and the control method that can reduce sensor BOM cost, but because need to have estimation of electric machinery angle and vector pilot operation, because this MCU needs taller CPU,handle function. RX72T is controlled to realize 4 electric machinery, used RX kernel of the 3rd acting CPU ” RXv3 ” (6.01 CoreMark/MHz) with trigonometric function accelerator (TFU) , have congener the fastest CoreMark performance, can carry out vector to control requires operation and processing quickly. The advantage is to still have the electric machinery such as complementary PWM timer and ADC to control needs function, in order to realize the control of 4 electric machinery.
The function that uses in control of 4 electric machinery
In this demonstrating, will use function of the following periphery to realize 4 electric machinery to control:
Use RX72T has sketch map of pilot of 4 electric machinery
Pilot of 4 electric machinery wants a place
Be in this period in demonstrating, through having sensor vector control is opposite most 4 electric machinery have speed control and independent drive, but this need detects the electric current of every electric machinery undertakes corresponding PWM is outputted. This electric current detects sequential and the sequential that undertake controlling operation are key of pilot of much electric machinery, here brief introducing. Additional, this period demonstrated to use detect two-phase electric current is reductive the means of three-phase electric current.
RX72T deployed 3 ADC in all, this period demonstrate electric machinery 1 with electric machinery the electric current of 2 detects minute of admeasure is unit 0, electric machinery 3 with electric machinery the electric current of 4 detects minute of admeasure is unit 1. The electric machinery electric current that distributes same unit detects sequential must stagger, because cannot detect at the same time electric current. Electric current is to pass billabong resistor to detect the arm below inverter is in the electric current that guides during connecting, had flowed, through installing electric machinery reversely 1 and 2, electric machinery 3 mix with the PWM positive of 4 the effective n that believes signal instead, the signal that prevents the arm below inverter guides at the same time. Accordingly, AD changeover sequential distributings the peak in PWM / cereal side, the electric current that realizes each electric machinery thereby detects. Through using ” group scanning mode ” , AD changeover is OK the electric current that supports two electric machinery in an unit detects.
PWM plays brachial significance on inverter of antipodal get along with
※ electric machinery 1 can detect in the peak side of PWM electric current, electric machinery 2 can detect in the cereal side of PWM electric current.
Control handles sequential
Next we see whole sequential, include electric machinery to control sequential. Important is PWM interrupts processing (vector controls processing) , the amortize register that changes sequential and PWM output with the AD that detects at electric current transmits sequential.
Electric machinery 1 with electric machinery 2 as synchronous as MTU timer, AD changeover sequential distributings to be mixed in peak side cereal side, the transmission sequential of the executive sequential that adjusts PWM cycle to interrupt and amortize register matchs to it. Electric machinery 3 with electric machinery timer of 4 use GPT, work in order to be similar to the working way of electric machinery 1/2.
All sorts of processing of electric machinery 1/2 sequential
All sorts of processing of electric machinery 3/4 sequential
Because ※ is in data is not newer during the Gu Zhong of 4 breaks electric machinery, because this is carried out with electric machinery 2 same acts.
Fall to be started at the same time in same carrier wave frequency when MTU and GPT when, if MTU is mixed of GPT interrupt first step identical, criterion from produce discontinuous one party to begin above all ordinal carry out interrupt processing. Need setting controls cycle, in order to make these processing time are inside control cycle. When use RX72T, the processing time of every electric machinery is 8[us] left and right sides, because this is in this period in demonstrating, voltaic control periodic setting is 50us do not have a problem.
Circumstance of pilot of 4 electric machinery
This period of the introduction although,demonstrate advocate board with cable kind the product did not make public a sale, but actual moving process has been made public with the form of video. With much electric machinery control is exemple, if you are interested to click language minor details to read please textual examine video: Use individual MCU to undertake the speed of 4 electric machinery is controlled
APN: Of electric machinery of permanent magnetism synchronism control without sensor vector (4 electric machinery are controlled) RX72T is installed piece (Evaluation System For BLDC Motor) Rev.1.00
Code of give typical examples: Of electric machinery of permanent magnetism synchronism control without sensor vector (4 electric machinery are controlled) RX72T is installed piece (Evaluation System For BLDC Motor) code of Rev.1.00 – give typical examples
This period of the introduction demonstrated to make full use of the function of RX72T, realized control of 4 electric machinery, can serve as carry out information of reference of pilot of much electric machinery. The welcome controls interested client to use program of RX72T and our give typical examples to much electric machinery. RX72T besides have control without sensor vector besides, the vector control that still offerred use coder will control the code of give typical examples of 3 electric machinery and applied guideline, broad user also can consult code of these give typical examples and applied guideline, the attempt undertakes with RX72T the much electric machinery of other way is controlled.
The information detailed that through coder vector control dominates 3 electric machinery sees the following link:
APN: The coder vector of electric machinery of permanent magnetism synchronism is controlled (3 electric machinery are controlled) RX72T is installed piece (Evaluation System For BLDC Motor) Rev.1.00
Code of give typical examples: RX72T Vector Control For Permanent Magnet Synchronous Motor With Encoder (Implementation) (Control Over Three Motors) For “Evaluation System For BLDC Motor” Rev.1.00 – Sample Code
Video: Individual MCU supports position of 3 electric machinery to control
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