霍爾推無刷直流電機(jī)技術(shù) 不必斬波穩(wěn)定

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元器件交易網(wǎng)訊 11月18日消息，據(jù)外媒 Electronicsweekly報道，霍爾(Honeywell)宣布開發(fā)出新傳感器集成電路技術(shù)，簡化了無刷直流電機(jī)的運(yùn)作，從而不再使用霍爾元件上的斬波器穩(wěn)定作用，最終提供清晰的輸出信號。

霍爾公司表示：“最初設(shè)計者可能會謹(jǐn)慎考慮傳感器是否使用斬波穩(wěn)定作用，最終我們得出了結(jié)論，相比使用斬波器穩(wěn)定作用的高靈敏度霍爾效應(yīng)雙極鎖存?zhèn)鞲衅骷呻娐?，我們可獲得更快的鎖存器響應(yīng)時間，并在快速對磁場的變化做出響應(yīng)以提高電機(jī)效率的同時，能夠?qū)θ醮艌鲎龀鲰憫?yīng)并具有始終如一的重復(fù)性。”

霍爾傳感器優(yōu)點(diǎn)：

- 靈敏度較高

-體積很?。罕阌谥瞥商厥庖?guī)格的探頭，例如只有零點(diǎn)幾毫米厚的磁場強(qiáng)度儀

霍爾傳感器缺點(diǎn)：

-互換性差

-信號隨溫度變化

-非線性輸出：需要用單片機(jī)進(jìn)行非線性和溫度校正

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此前，公司已推出高靈敏度雙極鎖存數(shù)字霍爾效應(yīng)傳感器集成電路SS360NT/360ST/460S，是由永磁體或者電磁體提供的磁場進(jìn)行操作，其磁靈敏度一般高達(dá) 30 G（最大靈敏度為 55 G），可對變換的南北極作出響應(yīng)。其中，SS360NT 通過北極開啟，SS360ST 和 SS460S 通過南極開啟。

特性

-同級產(chǎn)品中最快的響應(yīng)時間：直流無刷電機(jī)電流換向時效率更高

-無斬波器穩(wěn)定作用：產(chǎn)生清晰的輸出信號

-高靈敏度：30 G(最大靈敏度為 55 G)

-可接受從3 Vdc 到24 Vdc 的任何直流電源電壓

-在整個-40°C至150°C [-40°F 至 302°F]的溫度范圍內(nèi)穩(wěn)定輸出

SS360NT/SS360ST以小型 SOT-23 表面安裝封裝形式提供，SS460S則以小型TO92表面安裝封裝形式提供。這些產(chǎn)品以卷帶和卷盤（每卷 3000 個）的包裝形式供貨。

(元器件交易網(wǎng)龍燕 譯)

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.