YZZ series spindle three-phase asynchronous motorDetailed product description：

I. Overview
YZZ spindle three-phase asynchronous motor is a product specially designed for the machine tool industry based on the actual operating performance indicators of machine tools and the advantages of many similar products at home and abroad. This motor can be matched with various medium and high-end servo drives or frequency converters at home and abroad for open-loop or closed-loop control, achieving wideband, high-speed, and high-precision control operation. Its excellent mechanical characteristics and compact and beautiful appearance make it the preferred matching product for advanced CNC machine tools to enhance performance and upgrade grades.
This motor has good speed regulation performance, with good starting performance at both low and high speeds. The motor has excellent characteristics of low vibration and low noise throughout the entire frequency range.

2、 Usage characteristics
1. High efficiency, high reliability, high overload capacity, and high protection level.
2. The rotor is finely calibrated for dynamic balance, with high balance quality and low vibration.
3. Adopting high-precision and low-noise imported bearings.
4. Axial flow fans provide forced heat dissipation, strong wind power, and unique internal ventilation channels to ensure effective heat dissipation and limit resonance of the motor at any speed, achieving long-term operation at high or low speeds.
5. The built-in thermal protection device cuts off the power supply to the motor winding when it reaches a dangerous temperature, preventing the motor from burning out.
6. Beautiful appearance, reasonable structure, small size, and light weight.

3、 YZZ series spindle three-phase asynchronous motor model description

4、 Technical data at fundamental frequency of 50Hz

model	rated power kW	rated torque N·m	rated current A	Blocking rotation distance multiple	Blockage current multiple	Maximum torque multiple	speed r/min	weight （kg）
YZZ3.7-4	three point seven	twenty-four	seven point eight	two point two	seven	two point three	one thousand four hundred and thirty	fifty-two
YZZ5.5-4	five point five	thirty-six	eleven point five	two	seven	two point three		seventy
YZZ7.5-4	seven point five	fifty	fifteen	two point one	seven	two point three		eighty-five
YZZ11-4	eleven	seventy-two	twenty-two	three point five	eight point one	three point six	one thousand four hundred and thirty	one hundred and twenty
YZZ15-4	fifteen	ninety-seven	thirty	three point seven	eight point seven	three point six		one hundred and forty-one
YZZ18.5-4	eighteen point five	one hundred and twenty	thirty-six	four point two	nine point five	four point two		one hundred and sixty-three

5、 Characteristics Table of YZZ Series Spindle Three phase Asynchronous Motor

feature	Feature Description		remark
voltage	Three phase AC 380V		Various contents can also be customized according to user requirements
output power	3.7-18.5kW
polar number	four
insulation class	F (maximum allowable temperature rise of 105K)
cooling method	Independent fan forced ventilation cooling
protection level	IP54
Installation method	B5
Overall dimensions	See attached figure
Standard steering	Clockwise rotation from the perspective of the shaft extension
Motor shaft output	With keyway or optical axis
protective device	Pre embedded 125 degree thermal protector for winding
encoder	optional
Usage environment	venue	Indoor (avoid too much corrosive gas)
	altitude	below 1000 meters
	temperature	-15—40℃
	humidity	Relative humidity 80% (non condensing)

6、 Appearance and installation dimensions

model

Appearance and installation dimensions

D

E

F

G

M

N

L1

T

AA

AC

P

L

basic size

limit deviation

basic size

limit deviation

basic size

limit deviation

basic size

limit deviation

basic size

basic size

limit deviation

basic size

basic size

YZZ3.7-4

thirty-two

-0.009 -0.025

eighty

±0.37

ten

0 -0.036

twenty-seven

0 -0.20

two hundred and fifteen

one hundred and eighty

0 -0.04

seventy

five

two hundred and five

two hundred and sixty

two hundred and fifty

four hundred and ninety

YZZ5.5-4

five hundred and sixty

YZZ7.5-4

one hundred and ten

±0.43

ninety

six hundred and fifty

YZZ11-4

forty-eight

+0.018 +0.002

one hundred and ten

±0.43

fourteen

0 -0.043

forty-two point five

0 -0.20

two hundred and sixty-five

two hundred and thirty

+0.016 -0.013

four

two hundred and sixty-five

three hundred and forty

three hundred

six hundred

YZZ15-4

six hundred and fifty

YZZ18.5-4

seven hundred

7、 Characteristic curve
1. Voltage frequency curve

model	F1	F2
YZZ3.7-YZZ7.5	fifty	two hundred and seventy
YZZ11-YZZ18.5		two hundred

2. Output power speed curve

model	n1	n2	n3	P1	P2
YZZ3.7-4	one thousand and five hundred	six thousand	eight thousand	three point seven	two point two
YZZ5.5-4				five point five	three point five
YZZ7.5-4				seven point five	five point five
YZZ11-4		four thousand	six thousand	eleven	seven point five
YZZ15-4				fifteen	eleven
YZZ18.5-4				eighteen point five	fifteen

3. Output torque speed curve

model	n1	n2	T1	T2
YZZ3.7-4	one thousand and five hundred	eight thousand	twenty-four	four
YZZ5.5-4			thirty-six	six point five
YZZ7.5-4			fifty	eight point five
YZZ11-4		six thousand	seventy-two	seventeen
YZZ15-4			ninety-seven	twenty-three
YZZ18.5-4			one hundred and twenty	twenty-nine

8、 Ordering Guide
The following content needs to be clarified:
Please indicate the model, power, voltage, frequency, connection method, installation type, etc. when placing an order.
2.2 If there are special requirements, such as double axis extension or other special axis extension, flange, abnormal frequency, abnormal voltage, etc., please specify when ordering.