[introduction] having sensor FoC is a kind wide do not have welcomely brush electric machinery to control a technology, be moved in report by application tool, high-powered blower, sweep the floor in the relevant product such as the robot. Accelerate ceaselessly as the iteration speed of new product, electric machinery also becomes more severe to controlling the demand of algorithm exacting. To this, lucky Sa electron rolled out 180 ° not to have sensor magnetic field directional control (FoC) dynamoelectric tool solution, its are used be based on linkage and high frequency infuse (HFI) two kinds of algorithmic advantages, solved vector electric machinery to control the common pain spot in application, include maturity control algorithmic, low speed without sensor vector tall torque mode, restore to wait to high speed from low speed.

Systematic block diagram

Main parts of an apparatus introduces

The RX24T that type selecting of the MCU in this plan uses, it is one applies to double inverter pilot 32 MCU, inside buy floating-point is unit (FPU) , can realize complex inverter easily to control algorithm.

On the application of driver, this plan offerred two kinds of option:

# batteries voltage is more than 36V

When batteries voltage is more than 36V, can use 3 HIP2211 driver of half bridge MOSFET, its have powerful 3A drive to pull electric current and electric current of 4A drive fill, and defer of splitting 15ns model transmission and 2ns typical defer match, it is the outstanding option that high frequency switch uses. What it falls for requirement of severe exacting work only is reliable move and design, HS of its high speed, high pressure brings a foot to be able to bear be as high as – the abidance of 10V voltage, change with 50V/ns speed. Owe in the round pressure protection and but process designing prevents puncture protection to work in coordination, in order to ensure the MOSFET of its drive won’t because power source or other are exterior breakdown and attaint.

# batteries voltage is less than 36V

And when batteries voltage is less than 36V, can choose drive of RAA227063 intelligence grid IC replaces HIP2211 driver of half bridge MOSFET, RAA227063 is to be used at notting have to brush dc (BLDC) the intelligent grid driver of electric machinery application IC. It has drive of grid of intelligence of 3 half bridge, but drive amounts to MOSFET of 3 N raceway groove the bridge is received implement. This parts of an apparatus supports 4.5V to receive voltage to 60V bridge. Every grid driver all supports be as high as 1A to pull electric current and drive of 2A fill electric current, have but intensity of process designing drive controls a function.

On the choice of power source, the RAA212831 that this plan chooses is a 3 output manostat, combined 4.5V to come manostat of step-down of 72V input, 0.5A and two low pressure differ linear manostat (LDO) output. Step-down manostat is in guide continuously a mode (CCM) the fixed switch frequency that next having is 350kHz, enter when light load discontinuous guide a mode (DCM) , jump over mode in order to realize pulse.

Besides, plan still used 6 RBA250N10CHPF-4UA02, its are the MOSFET of N raceway groove that applies at tall electric current, have admirable property. And to put size signal, this plan still used ISL28114 operation amplifier, this product is an only channel is general-purpose the operation amplifier that small power comsumption, course is inputted to course and outputs. Limits of voltage of its power source is 1.8V~5.5V, have small source current, fall in room temperature most greatly 390 μ A. Be based on low slant the characteristic of buy electric current and limits of wide input voltage, make the global use that ISL28114 parts of an apparatus makes wide application is put.

Lucky Sa electron devotes oneself to to help a client solve all sorts of technology challenges and applied problem all the time, in order to make their product more intelligence, efficient and reliable. This plan has for a special purpose 180 ° do not have sensor vector algorithm, can use at having the gardens tool of Flux+HFI, its are special MCU can realize complex control algorithm easily, improved the function of dynamoelectric tool and efficiency effectively. Future, we can develop innovation ceaselessly, those who roll out more to get used to market demand, the solution of high quality.

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