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THREE-PHASE ASYNCHRO
THREE-PHASE ASYNCHRONOUS MOTOR TECHNICAL DATA
一、Brief Introduction
1.Types of Constructions And Mounting Arrangements
1.1 According to terms of GB997、IEC34-7，showing as following as Fig.1
1.2 Ciassification of Degree of Protection
The main function is to prerent man from damage of electricity or rolling and or to prevent solid object 、water、oil from entering, it conforms to GB4942 and IEC34-5.as Tab.1
Lw= Lp+10lg(S/S0)
如按半球面法的测量面积 S=2πr2 r=1m时
Area in half sphere S=2πr2 r=1m
S=6.2832㎡ S0 ----基准面积1㎡时，则有
Benchmark area
It is necessary to separate with insulation material between electric parts and casting, life of insulation material with insulation degree of its material and temperature have very closed relations, the motor is a elements to conversion the energy and signal the motor consume energy itself during its running. Temperature rising caused by energy consumption. normally insulation degree and limit of temperature rise in method of resistance check are according with Tab.5 as following, it is according to GB755 and IEC34-1.
1.Types of Constructions And Mounting Arrangements
1.1 According to terms of GB997、IEC34-7，showing as following as Fig.1
1.2 Ciassification of Degree of Protection
The main function is to prerent man from damage of electricity or rolling and or to prevent solid object 、water、oil from entering, it conforms to GB4942 and IEC34-5.as Tab.1
图1
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代号
Code
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含义
Vertical
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第一位数字
Initial No.
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含义
Vertical
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第二位数字
Second No.
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含义
Vertical
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IP
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国际防
护形式
International
Protection
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2
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防大于12mm固体（例如手指）
＞12mm solid obiect(finger)
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1
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防垂直滴水
drop water
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2
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防外壳15°范围内倾斜
时垂直滴水
An enclosure within 15 degrees of tilt certical drop
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||||
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3
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防大于2.5mm固体
＞2.5mm solid obiect
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3
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防淋水
drench water
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||
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4
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防大于1mm固体
＞1mm solid obiect
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4
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防溅水
Splash water
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||
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5
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防喷水
Spray water
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||||
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5
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防尘
dust
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6
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防淋水
drench water
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表1Tab.1
2.Connection Mode And Rotation Direction
2.1 3-phase motor (single speed)
It can be connected to two modes Y and Δ connection as Fig.2, Δ connection as Fig.3.
If the power supply is connected to Y mode and the voltage symbolized UY, the voltage of motor connected toΔmode has following relation, U= UY/ ,so the current has following relation:I= IY。
2.2 3-phase motor (two speeds)
Three-phase, two-speed motor is commonly designed to single winding, pole adjustable motor, so it can be used in the situation of starting directly, the connection modes are 2Y/Δand 2Y/Y,2Y connection as Fig.4 , Δor Y connection as Fig.5 .
2.3 three-phase motor (double voltages)
If the three-phase motor can be used in double voltages (such as NEMA motor, it can be used in 230V and 460V), the motor has 9 leads and has two connections, 2Y/Y and 2Δ/Δ, symbol of wire ends as Fig.6 and Fig.7 connection mode as Tab.2
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电压
Voltages
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接法
Connection
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L1
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L2
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L3
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连接
Connection
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230V
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2Y
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T1、T7
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T2、T8
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T3、T9
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（T4、T5、T6）
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460V
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Y
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T1
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T2
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T3
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（T4、T7）（T5、T8）（T6、T9）
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230V
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2Δ
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T1、T6、T7
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T2、T4、T8
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T3、T5、T9
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----------------------------
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460V
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Δ
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T1
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T2
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T3
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（T4、T7）（T5、T8）（T6、T9）
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. 表2 Tab.2
二、 Comman measurement units and conversion
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名称 Deseription
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SI单位 Unit
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英制单位 Non-SI Unit
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备注 Remark
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电压Voltage
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V
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V
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电流 Current
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A
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A
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转矩 Torque
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N.m
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Oz.in
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1N.m=141.6 Oz.in
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转速 Speed
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r/min
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r/min
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频率 Frequency
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Hz
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Hz
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功率 Power
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W
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Hp
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1W=1.341×10-³ Hp
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效率 Effciency
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%
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%
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质量 Weight
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g
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lb
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1g=2.2046×10-³ lb
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力 Power
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N
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lb
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1N=0.2248 lb
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长度 Length
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mm
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in
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1mm=0.03937in
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表3 Tab.3
Conversion in electric parameter：
输出功率（W） Output(W)
转矩T（N.m）= -----------------------×9.55 Torque T(N.m)= ----------------×9.55
转速（r/min） Speed（r/min）
转矩T（N.m）= -----------------------×9.55 Torque T(N.m)= ----------------×9.55
转速（r/min） Speed（r/min）
输入功率（W） lnput(W)
额定电流 lN（A）= ----------------------- Rated current lN（A）= -------------------------------
电压（V）×功率因数 Voltage（V）×Power factor
额定电流 lN（A）= ----------------------- Rated current lN（A）= -------------------------------
电压（V）×功率因数 Voltage（V）×Power factor
输出功率（W） Output(W)
效率 η（%）= ---------------------- ×100% Eff. η（%） = ----------------×100%
输入功率（W） lnput(W)
120×频率（Hz） 120×Frequency (Hz)
同步转速no（r/min）= ----------------------- Syn.speed no（r/min）= --------------------------
极数 Poles
效率 η（%）= ---------------------- ×100% Eff. η（%） = ----------------×100%
输入功率（W） lnput(W)
120×频率（Hz） 120×Frequency (Hz)
同步转速no（r/min）= ----------------------- Syn.speed no（r/min）= --------------------------
极数 Poles
同步转速（r/min）-额定转速（r/min） Syn.speed（r/min）--rated speed（r/min）
滑差 S = ----------------------------------------- Slip S= -------------------------------------------------
同步转速（r/min） Syn.speed（r/min）
滑差 S = ----------------------------------------- Slip S= -------------------------------------------------
同步转速（r/min） Syn.speed（r/min）
Noise unit （A right）
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名称 Deseription
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符号 Symbol
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单位 Unit
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声功率级 sound power degree
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Lw
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dB
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声压级 sound pressure degree
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Lp
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dB
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表4 Tab.4
Lw= Lp+10lg(S/S0)
如按半球面法的测量面积 S=2πr2 r=1m时
Area in half sphere S=2πr2 r=1m
S=6.2832㎡ S0 ----基准面积1㎡时，则有
Benchmark area
Lw≈ Lp+8
It is necessary to separate with insulation material between electric parts and casting, life of insulation material with insulation degree of its material and temperature have very closed relations, the motor is a elements to conversion the energy and signal the motor consume energy itself during its running. Temperature rising caused by energy consumption. normally insulation degree and limit of temperature rise in method of resistance check are according with Tab.5 as following, it is according to GB755 and IEC34-1.
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等级
degree
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使用极限温度
Temp limit
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温升限值
Limit of temp.rise
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E
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120℃
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75K
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B
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130℃
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80K
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F
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155℃
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105K
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H
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180℃
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125K
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temperature of bearing
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轴承类型 bearing type
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温度限值 temp limit
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滑动轴承 sleeve bearing
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80℃
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滚动轴承 ball and roller bearing
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90℃
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