3 Hp (2.2kW) 3 Phase 2 Pole AC Induction Motor

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Model: RDDLZ-IM-22002P
Weight: 1.00
SKU: RDDLZ-IM-22002P

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This is a totally enclosed fan cooled 3-phase 4-pole induction motor with rated output 3 hp, rated speed 28740rpm in foot mounting. It can widely used in various kinds of general purpose machineries like fans, pumps, compressors, machine tools, transportation, etc.

3hp Induction Motor Specification

Basics	Model	RDDLZ-Y2-90L-2
	Design Standard	IEC
	Weight	24kg
	Frame Type	90L
	Mounting	Horizontal Foot Mounting (B3)
	Wiring Method	Output≤4hp (3kW), Y connection Output≥5.5hp (4kW), Delta connection
	Degree of protection	IP54/IP55
	Insulation Class	Class F
	Cooling	TEFC (compliance to IC 411 code of IEC 60034-6)
Technical Parameters	Nominal Output	3.0hp or 2.2kW
	Pole Number	2-pole
	Nominal Speed	2840rpm
	Frequency	50Hz
	Nominal Voltage	380V (Y connection by default) / 220V (Change Y to Δ connection on your own)
	Nominal Current (full load)	4.85A/8.4A
	Efficiency	81.0%
	Power Factor( cosφ)	0.85
	Nominal Torque (Tn)	7.4Nm
	Locked Rotor Torque/Nominal Torque (TST/Tn)	2.2
	Maximum Torque/Nominal Torque (Tmax/Tn)	2.3
	Locked Rotor Current/Nominal Current (IST/In)	7.0
	Noise Level	72dB/(A)
Environment	Ambient Temperature	-15℃+40℃
	Altitude	Less than 1000m above sea level

3-phase Induction Motor Dimensions

Frame Type	Mounting Dimensions (mm)										Overall Dimensions
Frame Type	A	A/2	B	C	D	E	F	G	H	K	AB	AC	AD	HD	L
90L	140	70	125	56	24	50	8	20	90	10	180	195	155	250	345

Wiring Diagrams (Three-phase squirrel-cage induction motor)

Details

Tips: Three-phase induction motor’s speed control method
Three-phase induction motor speed is calculated: n = 60f (1-s) / p
It is seen from the above formula that changing power supply frequency f, motor pole pairs p and slips can achieve the purpose of changing the rotate speed. From the perspective of the nature of speed control, different speed control methods are nothing more than changing the synchronous speed of alternating current motor or not changing the synchronous speed. The speed control method of not changing the synchronous speed is widely used in manufacturing machinery including series resistance in the rotor of wound-type motor, chopper, cascade and electromagnetic slip clutch, hydraulic coupling, oil film clutch etc. Changing the synchronous speed consists of multi-speed motor of stator pole pairs, stator voltage and frequency conversion etc.
In views of energy consumed at speed control, there are two types including high-efficiency speed control and low-efficiency speed control. High-efficiency speed control refers to constant slip or non-slip loss, such as multi-speed motor, frequency control and control method of recovering the slip loss (for instance cascade speed control etc.). Slip loss speed control method is inefficient for example energy loss occur in the rotor circuit by the speed control method of series resistance in the rotator; Energy loss happens in the clutch coil by the speed control method of electromagnetic clutch; energy loss takes place in the hydraulic couplers oil by the speed control method of hydrodynamic coupling. Generally speaking, the slip loss increases with the expansion of speed range. If the speed range is not large, the energy loss will be very small.

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