The motor control of vacuum cleaner is moving from square wave drive to high-speed non-inductive FOC.Higher rotating speed,lower noise and stronger locked-rotor protection have become the key to the competition of the whole machine scheme.Facing this trend,RAMSUN introduced the FOC application solution with the microcontroller CMS32M65xx as the main control.The controller is dedicated to the motor control of vacuum cleaner,and a domestic high-end motor control chip covers the complete link from start-up to constant power operation.
1.Overview of domestic single-chip FOC vacuum cleaner scheme.
The vacuum cleaner scheme is controlled by Cmsemicon CMS32M65xx series MCU,which is a high-end special chip for motor control based on ARM-Cortex M0+core.Around the vacuum cleaner scene,the domestic single chip microcomputer scheme adopts non-inductive FOC and single resistance control mode,and integrates high-speed ADC,analog operational amplifier and programmable gain amplifier,which simplifies the peripheral circuit and realizes fast and smooth start,low noise operation and constant power output.The whole scheme provides standard output interfaces:FG,Vsp(or PWM),VCC and GND,which can directly connect the main control and speed regulation circuit of the whole machine,shortening the cycle of scheme evaluation and mass production introduction.
2.Parameters of Main Control Chip of Domestic Single Chip Microcomputer for 2 FOC Vacuum Cleaner.
①Core and main frequency:ARM-Cortex M0+,and the main frequency is as high as 64MHz.
②Working voltage:1.8V to 5.5V.
③storage:64KB Flash,8KB SRAM and 1KB Data Flash.
④Domestic single-chip microcomputer GPIO:up to 23.
⑤PWM:6-channel enhanced PWM,which can output complementary PWM with adjustable dead time.
⑥ADC:12-bit high-speed ADC with built-in sampling rate of 1.2Msps.
⑦Analog peripherals:2-channel analog comparator and 3-channel programmable gain amplifier with adjustable gain.
3.Scheme performance of domestic single-chip FOC vacuum cleaner.
①Simplify peripheral circuits:integrate 12-bit high-speed ADC,multi-channel high-performance analog operational amplifier and programmable PGA to reduce the system BOM and design difficulty.
②Self-convergence direct closed-loop startup:it adapts to different loads and starts successfully.
③Excellent start against the wind:fast and steady start,no out-of-step,smooth operation and low noise.
④Constant power control:linear choke is identified and protected,giving consideration to suction and safety of the whole machine.
⑤Ultra-high speed support:the speed control can be as high as 120000+RPM,which meets the requirements of high-speed vacuum cleaners.
⑥Excellent EMC performance:Excellent CE and ESD performance,EFT>;4200V,strong anti-interference ability.
RAMSUN can provide domestic single-chip microcomputer scheme evaluation,application support and mass production supporting services.Welcome customers who need vacuum cleaner motor control to contact for more scheme information and technical exchange.
Keywords:domestic single chip microcomputer
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Shenzhen Ramsun Microelectronics Co.,Ltd（Ramsun International） is a vendor of the seimicondutor componets and the memory IC’s solution with clear market advantage. We still focus on the promotion for some famous semicondutor brand ,and specially take the RAM(Random Access Memory) as our core products.
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