How does the working principle of a 3-phase induction motor differ from that of a single-phase induction motor?

The key difference between these two types of motors lies in the power supply they require. A single-phase induction motor operates on a single alternating current (AC) voltage source, while a 3-phase induction motor requires three separate AC voltage sources with a phase difference of 120 degrees between them. This difference in power supply affects the motor's starting torque, efficiency, and overall performance. 3-phase motors typically provide smoother and more reliable operation, making them suitable for industrial applications, whereas single-phase motors are often used in smaller appliances and machines.

Between the induction motor and the DC motor, which one is more suitable for variable-speed applications and why?

DC motors are generally more suitable for variable-speed applications because their speed can be easily controlled by adjusting the voltage supplied to them. This feature allows precise speed regulation, making DC motors ideal for applications like robotics and conveyor systems. On the other hand, induction motors, especially single-phase ones, are typically less suited for variable-speed control, as their speed is primarily determined by the frequency of the AC power supply.

How do gear heads contribute to the performance of motors?

Gear heads, also known as gearboxes, are often used in conjunction with motors to achieve specific speed and torque requirements. They allow motors to transmit power more efficiently by matching the motor's speed and torque characteristics to the needs of the application. Gear heads can increase output torque, reduce speed, and enhance precision in various automation processes.

Are there motors with adjustable speed or direction?

There are motors designed with adjustable speed and direction control. These motors often incorporate electronic speed controllers (ESCs) or variable frequency drives (VFDs) that allow for precise adjustment of motor speed and the ability to reverse direction. Such motors are commonly used in applications where flexibility and control are essential, such as in conveyor systems, robotics, and industrial machinery.

What are the typical applications of AC motors?

AC motors find widespread use in various applications, including fans, pumps, compressors, conveyor systems, HVAC (heating, ventilation, and air conditioning) units, and industrial machinery. Their versatility, reliability, and ability to operate on AC power grids make them essential in many automation and industrial processes.

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SPG Small AC Motors

Small AC Motors products in the Automation Components category from SPG. The product can be selected based on many product specifications such as Type, Motor Type, Rated Output, Square Flange Dim. A, Power Supply. SPG offers products around 11 items and the product specifications can easily be compared. Search and select detailed specifications of parts for your machine with free CAD downloads. SPG products are available to order through MISUMI online 24 hours a day. Free shipping, no minimum order.

Configure

Specification/Dimensions

Type
- Motors
- Gear Head Only
- Motor Only
- Others
- Set
- Controller Only
- Motor group
Clear

Motor Type
Extra Low Speed Synchronous

Induction

Reaction Synchronous

Reversible

Speed Control

Torque
Clear

Rated Output(W)
1

3

3.5

5

5.5

6

6.5

9

10

14

15

20

22

25

30

35

40

60

60~90

90

100

150

200
Clear

Square Flange Dim. A(mm)
42

56.4

60

60X130

70

80

83

85

90

91.5

104

106.5

120
Clear

Power Supply
3-Phase

Single-Phase
Clear

Reduction Ratio
2

3

3～180

3.6

5

6

7.5

9

10

10 (Middle gearhead)

12.5

15

18

20

25

30

36

40

50

60

75

90

100

120

150

180

200

250

300

360

450

600

1200
Clear

Gear Head Type
- Not Provided
- Parallel Shaft
- Perpendicular Shaft
- Linear
Clear

Electromagnetic Brakes, Clutches
- Not Provided
- Electromagnetic Brakes
- Clutch
Clear

Environment
- Standard
- Waterproof
- Dust Resistant
- Explosion Proof
Clear

Voltage(V)
Single-Phase 110V

Single-Phase 110VAC

Three-Phase 200/220V

Single-Phase 220VAC

Single-Phase 220/230V

Single-Phase 220/230VAC

Three-Phase 380/415V
Clear

Voltage(V)
24

100

110

115

200

220

230

240

380

400

415
Clear

Brand	(3) (0) ESCO (12) ORIENTAL MOTOR (71) PANASONIC (3) SPG (11) SUMITOMO (8)
CAD	2D 3D

11 items

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: 30; 60; 90

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Induction Motor Gearhead Single Unit

SPG

Precision machining of motor shaft and helical gear reduces noise level by 10-15 dB. 1/3 to 1/200 reduction ratio series. Use an intermediate gearhead (reduction ratio 1/10) for 1/200 or more.

From: ฿ 3,910.18
Days to Ship: 4 Day(s)

4 Day(s)

Compare

Induction Motor 60W [S9I60]

SPG

Capacitor run single-phase motor and three-phase induction motor are available. Allows for continuous rated operation.

[Features]
· The startup torque of a capacitor run type single-phase motor is not that great, but it has a simple structure and is reliable, with high efficiency and low noise.
· The startup torque of a three-phase motor is great, for high reliability and high efficiency.
· There are 2 types of voltage specifications for single-phase motors (C [100V50/60Hz and D200V50/60Hz]) and 1 type for three-phase motors (U [200V50/60Hz)]
· The rated number of rotations fluctuates depending on the size of the load.
· When changing the rotary direction of a single-phase motor, do so after completely stopping the motor.

From: ฿ 4,213.06
Days to Ship: 4 Day(s)

4 Day(s)

Compare

Induction Motor 40W [S9I40]

SPG

From: ฿ 3,149.29
Days to Ship: 4 Day(s)

4 Day(s)

Compare

Induction Motor 25W Gear Head [S8KA3]

SPG

Precision machining of motor shaft and helical gear reduces noise level by 10-15dB.

[Features]
· Allowable torque from when combined with gearhead.
· Allowable torque when connected with a middle gearhead with a reduction ratio of 1/10 is 7.84N-m

From: ฿ 1,493.76
Days to Ship: 4 Day(s)

4 Day(s)

Compare

Induction Motor 15W Gear Head [S7KA3]

SPG

Precision machining of motor shaft and helical gear reduces noise level by 10-15dB.

[Features]
· Capacitor run single-phase motor and three-phase induction motor are available.
· The startup torque of a capacitor run type single-phase motor is not that great, but it has a simple structure and is reliable, with high efficiency and low noise.
· The startup torque of a three-phase motor is great, for high reliability and high efficiency.
· There are 2 types of voltage specifications for single-phase motors (C [100V50/60Hz and D200V50/60Hz]) and 1 type for three-phase motors (U [200V50/60Hz)]
· Allows for continuous rated operation.
· The rated number of rotations fluctuates depending on the size of the load.
· When changing the rotary direction of a single-phase motor, do so after completely stopping the motor

From: ฿ 1,334.55
Days to Ship: 4 Day(s)

4 Day(s)

Compare

Induction Motor 40W Gear Head [S9KB3]

SPG

From: ฿ 1,815.18
Days to Ship: 4 Day(s)

4 Day(s)

Compare

Induction Motor 25W [S8I25]

SPG

From: ฿ 2,598.10
Days to Ship: 9 Day(s)

9 Day(s)

Compare

Induction Motor 6W Gear Head [S6DA3]

SPG

- Induction Motor 6W Gear Head, S6DA series from SPG.
- Wide Variety of Products Gearheads are available with 24 different gear ratios from 1:3 to 1:200.
- The rotation direction can be selected both Reverse direction to the motor or Same direction as the motor.
- Rotational speed based on no-load speed divided by gear ratio.
- The actual rotation speed is less 2-20% than the displayed value according to the load.

From: ฿ 1,235.65
Days to Ship: 4 Day(s)

4 Day(s)

Compare

Induction Motor 15W [S7I15]

SPG

From: ฿ 2,514.28
Days to Ship: 9 Day(s)

9 Day(s)

Compare

Induction Motor Middle Gear Head

SPG

- Induction Motor Middle Gear Head, SGX series from SPG.
- Precision machining of motor shaft and helical gear reduces noise level by 10-15dB.
- Applicable for 5 sizes of gear flange, 60 mm, 70 mm, 80 mm, 60X130 mm, and 90 mm.
- The gear reduction ratio is 1:10.
- The actual rotation speed is less 2-20% than the displayed value according to the load.
- Product line up in this series includes, S6GX10B, S7GX10B, S8GX10B, S9GX10BH-S and S9GX10BL.

From: ฿ 2,067.86
Days to Ship: 4 Day(s)

4 Day(s)

Compare

Induction Motor 6W [S6I06]

SPG

From: ฿ 2,446.14
Days to Ship: 9 Day(s)

9 Day(s)


Brand
Product Series
CAD
From
Days to Ship
Type
Motor Type
Rated Output(W)
Square Flange Dim. A(mm)
Power Supply
Reduction Ratio
Gear Head Type
Electromagnetic Brakes, Clutches
Environment
Voltage(V)
Voltage(V)

	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare	You can add up to 6 items per a category to the compare list.Compare
Brand	SPG	SPG	SPG	SPG	SPG	SPG	SPG	SPG	SPG	SPG	SPG
Product Series	Induction Motor Gearhead Single Unit	Induction Motor 60W [S9I60]	Induction Motor 40W [S9I40]	Induction Motor 25W Gear Head [S8KA3]	Induction Motor 15W Gear Head [S7KA3]	Induction Motor 40W Gear Head [S9KB3]	Induction Motor 25W [S8I25]	Induction Motor 6W Gear Head [S6DA3]	Induction Motor 15W [S7I15]	Induction Motor Middle Gear Head	Induction Motor 6W [S6I06]
CAD	2D / 3D	2D / 3D	2D / 3D	3D	2D / 3D	3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D
From	฿ 3,910.18	฿ 4,213.06	฿ 3,149.29	฿ 1,493.76	฿ 1,334.55	฿ 1,815.18	฿ 2,598.10	฿ 1,235.65	฿ 2,514.28	฿ 2,067.86	฿ 2,446.14
Days to Ship	4 Day(s)	4 Day(s)	4 Day(s)	4 Day(s)	4 Day(s)	4 Day(s)	9 Day(s)	4 Day(s)	9 Day(s)	4 Day(s)	9 Day(s)
Type	Gear Head Only	Motor Only	Motor Only	Gear Head Only	Gear Head Only	Gear Head Only	Motor Only	Gear Head Only	Motor Only	Gear Head Only	Motor Only
Motor Type	-	Induction	Induction	-	-	-	Induction	-	Induction	-	Induction
Rated Output(W)	90	60	40	25	25	40	25	25	15	-	6
Square Flange Dim. A(mm)	60X130 ～ 90	90	90	80	70	90	80	60	70	60 ～ 90	60
Power Supply	-	Single-Phase	3-Phase ～ Single-Phase	-	-	-	Single-Phase	-	Single-Phase	-	Single-Phase
Reduction Ratio	3 ～ 200	-	-	3 ～ 180	3 ～ 200	3 ～ 180	-	3 ～ 200	-	10	-
Gear Head Type	Parallel Shaft	-	-	Parallel Shaft	Parallel Shaft	Parallel Shaft	-	Parallel Shaft	-	Parallel Shaft	-
Electromagnetic Brakes, Clutches	-	Not Provided	Not Provided	-	-	-	Not Provided	-	Not Provided	-	Not Provided
Environment	Standard	Standard	Standard	Standard	Standard	Standard	Standard	Standard	Standard	Standard	Standard
Voltage(V)	-	-	-	-	-	-	-	-	-	-	-
Voltage(V)	-	200	100 ～ 200	-	-	-	100 ～ 200	-	100 ～ 200	-	100

Application example related to this category

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Related Categories to Small AC Motors

- Small AC Motors
- Other Motor Related Components

FAQ AC Motors

Question: How does the working principle of a 3-phase induction motor differ from that of a single-phase induction motor?: Answer: The key difference between these two types of motors lies in the power supply they require. A single-phase induction motor operates on a single alternating current (AC) voltage source, while a 3-phase induction motor requires three separate AC voltage sources with a phase difference of 120 degrees between them. This difference in power supply affects the motor's starting torque, efficiency, and overall performance. 3-phase motors typically provide smoother and more reliable operation, making them suitable for industrial applications, whereas single-phase motors are often used in smaller appliances and machines.
Question: Between the induction motor and the DC motor, which one is more suitable for variable-speed applications and why?: Answer: DC motors are generally more suitable for variable-speed applications because their speed can be easily controlled by adjusting the voltage supplied to them. This feature allows precise speed regulation, making DC motors ideal for applications like robotics and conveyor systems. On the other hand, induction motors, especially single-phase ones, are typically less suited for variable-speed control, as their speed is primarily determined by the frequency of the AC power supply.
Question: How do gear heads contribute to the performance of motors?: Answer: Gear heads, also known as gearboxes, are often used in conjunction with motors to achieve specific speed and torque requirements. They allow motors to transmit power more efficiently by matching the motor's speed and torque characteristics to the needs of the application. Gear heads can increase output torque, reduce speed, and enhance precision in various automation processes.
Question: Are there motors with adjustable speed or direction?: Answer: There are motors designed with adjustable speed and direction control. These motors often incorporate electronic speed controllers (ESCs) or variable frequency drives (VFDs) that allow for precise adjustment of motor speed and the ability to reverse direction. Such motors are commonly used in applications where flexibility and control are essential, such as in conveyor systems, robotics, and industrial machinery.
Question: What are the typical applications of AC motors?: Answer: AC motors find widespread use in various applications, including fans, pumps, compressors, conveyor systems, HVAC (heating, ventilation, and air conditioning) units, and industrial machinery. Their versatility, reliability, and ability to operate on AC power grids make them essential in many automation and industrial processes.