| 詳細(xì)參數(shù) | |||
|---|---|---|---|
| 品牌 | AB(Allen-Bradley) | 型號 | 25B-D024N114 |
| 結(jié)構(gòu)形式 | 整體式 | 安裝方式 | 現(xiàn)場安裝 |
| LD指令處理器 | 硬PLC | I/O點(diǎn)數(shù) | 5000 |
| 功能 | 50HZ | 工作電壓 | 50V |
| 輸出頻率 | 50Hz | 處理速度 | 50HZ |
| 程序容量 | 1000KB | 數(shù)據(jù)容量 | 200KB |
| 產(chǎn)品認(rèn)證 | CE | 環(huán)境溫度 | 50C |
| 環(huán)境濕度 | ,F50 | 加工定制 | 否 |
| 重量 | 10 | 產(chǎn)地 | 美國 |
| 外形尺寸 | 10,20,30 | ||
25B-D024N114
無刷減速電機(jī)如今已被各個行業(yè)應(yīng)用的廣泛，有些用戶在咨詢電機(jī)選型時會比較注重極對數(shù)，根據(jù)不同的應(yīng)用，不同的性能要求，用戶可以自行計(jì)算選擇，但選擇前必須明確極對數(shù)的意義。
下面介紹一個客戶案例，客戶要求電機(jī)外徑57mm，性能要求明確，特別要求是電機(jī)要6對極即15槽，經(jīng)工程師評估后推薦4對極的無刷減速電機(jī)BLDC57+G。
我們根據(jù)BLDC57+G無刷減速電機(jī)為例：
電機(jī)額定功率50W,電壓24V，極對數(shù)為4P，定子外徑57mm,內(nèi)徑27mm，定子鐵心長度60mm，電樞計(jì)算長度為61mm,電樞繞組形式與定子的槽配合，電機(jī)采用直流電機(jī)加減速機(jī)構(gòu)成，外形精美，后置編碼器，外置驅(qū)動。
1. 繞組排布，無刷減速電機(jī)BLDC57+G的繞組是雙層疊繞組，定子Y接 ，采用了雙層短距分布繞組可以避免電機(jī)的繞組產(chǎn)生環(huán)流并可以削弱電動勢諧波。定子繞組采用Y接 則可以大大減小電機(jī)的雜散損耗，使定子電流中不含3次和3次倍數(shù)的諧波，電子電流中亦不含偶次諧波。
2. 定子槽數(shù)的選擇
當(dāng)無刷減速電機(jī)固定時，槽數(shù)的多少決定繞線匝數(shù)的數(shù)量，加工制造商的難度，鐵心飽和的程度以及對轉(zhuǎn)矩的影響，槽數(shù)越多，可以降低氣隙磁阻的不均與程度，減小由此產(chǎn)生的轉(zhuǎn)矩脈動。由于電機(jī)槽引起磁路不均與而產(chǎn)生的轉(zhuǎn)矩稱為齒槽轉(zhuǎn)矩，工程上一般采用定子斜槽一個齒距方法來消除。
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