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霍尔推无刷直流电机技术 不必斩波稳定

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霍尔推无刷直流电机技术 不必斩波稳定0

元器件交易网讯 11月18日消息,据外媒 Electronicsweekly报道,霍尔(Honeywell)宣布开发出新传感器集成电路技术,简化了无刷直流电机的运作,从而不再使用霍尔元件上的斩波器稳定作用,最终提供清晰的输出信号。

霍尔公司表示:“最初设计者可能会谨慎考虑传感器是否使用斩波稳定作用,最终我们得出了结论,相比使用斩波器稳定作用的高灵敏度霍尔效应双极锁存传感器集成电路,我们可获得更快的锁存器响应时间,并在快速对磁场的变化做出响应以提高电机效率的同时,能够对弱磁场做出响应并具有始终如一的重复性。”

霍尔传感器优点:

- 灵敏度较高

-体积很小:便于制成特殊规格的探头,例如只有零点几毫米厚的磁场强度仪

霍尔传感器缺点:

-互换性差

-信号随温度变化

-非线性输出:需要用单片机进行非线性和温度校正

霍尔推无刷直流电机技术 不必斩波稳定1

此前,公司已推出高灵敏度双极锁存数字霍尔效应传感器集成电路SS360NT/360ST/460S,是由永磁体或者电磁体提供的磁场进行操作,其磁灵敏度一般高达 30 G(最大灵敏度为 55 G),可对变换的南北极作出响应。其中,SS360NT 通过北极开启,SS360ST 和 SS460S 通过南极开启。

特性

-同级产品中最快的响应时间:直流无刷电机电流换向时效率更高

-无斩波器稳定作用:产生清晰的输出信号

-高灵敏度:30 G(最大灵敏度为 55 G)

-可接受从3 Vdc 到24 Vdc 的任何直流电源电压

-在整个-40°C至150°C [-40°F 至 302°F]的温度范围内稳定输出

SS360NT/SS360ST以小型 SOT-23 表面安装封装形式提供,SS460S则以小型TO92表面安装封装形式提供。这些产品以卷带和卷盘(每卷 3000 个)的包装形式供货。

(元器件交易网龙燕 译)

外媒原文:

Honeywell sensor simplifies brushless motor design

Honeywell has developed sensor technology for brushless DC motors that does not need chopper stabilisation.

At its heart is a quad Hall element and proprietary programming resulting in “a sensitive and stable sensor across a range of temperatures that are required in different sectors such as robotics, portable medical equipment and HVAC technologies and appliances”, said Honeywell. “Initially designers may be cautious of using a sensor that does not have chopper stabilisation, but not only does the new technology overcome chopper stabilisation drawbacks, it also brings faster response time, repeatability, improved jitter performance and no additional electric noise generation over a range of temperatures.”

The firm has produced a paper that compares its chopper-less sensing with perceived rivals.

Called SS360NT/360ST/460S, the devices are designed to respond to alternating north and south poles.

SS360NT is turned on by a north pole, while the SS360ST and SS460S are turned on by a south pole.

Magnetic sensitivity is 30G typical (55G max).

Rise and fall times are 1.5us.

They offer reverse supply protection, deliver a stable output over -40 to 150°C, and accept any dc supply voltage from 3-24V.

The two 360s are in SOT23 while the 460 is in a flat TO92 package.


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