Linear synchronous motors with permanent magnets.

Relevance.

Modern technological equipment requires reliable highly dynamic and precise drive. For equipment in which the working bodies are rectilinear movement (drilling and milling machines, laser systems, cutting systems, plotters, precision positioners, etc.) is the most optimal actuator on the basis of linear motors. Consider the advantages of using a linear motor as compared to ball screw (ball screw)

a) The design advantages.
engine design fits well into the design of the positioner has smaller dimensions, a simple structure, no moving parts.
b) Operational benefits.
higher positioning accuracy due to the lack of backlash and vibrations, and at the lack of aerostatic bearings and friction. The higher speed of the lack of restrictions on the frequency of rotation of the screw and nut. So ballscrews maximum screw speed to 750 r / min. For screw pitch T = 20 mm at the maximum rotation speed of the screw is Vmax = 250 mm / sec = 0.25 m / s, while the speed of the linear motor may be equal to 5 m / s and the speed is limited only by the control system.
higher operating range temperatures due to the lack of restrictions on the thermal expansion of the screw.
Greater reliability and stability of parameters over time due to the lack of wear of mechanical parts with the application of aerostatic bearings.

Market.

          Consumers of linear motors are manufacturers of high-precision processing equipment (drilling and milling machines, laser systems, cutting systems, plotters, precision positioners, etc.) in the People's Republic of China, Russia, Ukraine and Belarus.

      Based on the above, is it appropriate to start manufacturing a broad series of linear motors for completing their various technological equipment.

Description of the constructions  of a linear synchronous motor with permanent magnets .

Figure 1. to illustrate an overall view of the basic module of the linear motor with permanent magnets on the tractive force 1000 N. moving part consists of a stack of plates and electrical steel coil and steel rails fixed with magnets glued with high-alloy NdFeB .

         

                                                  Figure 1.

                                                             .

            Motors with permanent magnets fixed on a steel rail has high dynamic performance and do not require high precision manufacturing and assembly. However, this type of motor there is a limit on the driving force due to the technological limitations on the size of the permanent magnets and their high cost. In addition the price of high-energy magnets are unstable and constantly growing due to the opening of new areas of application. Range of nominal effort for engines of this type 10 - 5000 N. Speed ​​range up to 5 m / s. Performance by a cooling method: natural air, forced air (fan), water, designs: one and two-way, design of bearings and linear mechanical aerostatic;
winding design: three-and two-phase, under common management systems for synchronous motors.

Technical characteristics of linear synchronous motors with permanent magnets.                                                                                                                                                                                                                                                                            

                                                                             Fig.2.

         Comparative characteristics of a proposed series of linear synchronous motors   Infra - LM with an iron yoke ( Ironcore ) and natural air cooling ( not cool ) compared to the linear motor type EPI05-0XX produced by a Chinese firm Changsha EPOCH NC Machine Tool Co ., Ltd   http://www . epochnc.com

                                                                                                                                                      Table 1

项目	参数	符号	单位	产品 型号
				EPI05-015		Infra-LM1		EPI05-050		Infra-LM2
额定 性能	峰值 推力	Fp	N	190		190		625		625
	持续推力(在温度 Tmax 下) 请 参阅 注释 ①	Fc	N	73		73		276		276
	电机常数(在 25 ℃ 下)	Km	N / (W ^ 0.5)	13.1		25		32		55
	最大 持续 耗散 功率	Pc	W	44		19		106		55
电气 规格	绕组 代号	\	\	A1	A5	A1	A5	A1	A5	A1	A5
	峰值 电流	Ip	Arms	11	19	11	19	11	19	11	19
	持续电流(在温度 Tmax 下)	Ic	Arms	3.9	6.7	3.9	6.7	4.4	7.6	4.4	7.6
	电阻(在 25 ℃ ± 10% 下)	Rm	欧姆 LL	1.4	0.47	0.56	0.2	2.6	0.87	1.34	0.5
	电感 ± 20%	L	MhL-L	9.1	3	2.5	1	26.7	8.9	9	3
	反电势常数(在 25 ℃ ± 10% 下)	Ke	Vpeak / m / s LL	15.4	8.9	15.4	8.9	51.4	29.7	51.4	29.7
	推力常数(在 25 ℃ ± 10% 下)	Kf	N / Arms	18.9	10.9	18.9	10.9	62.9	36.3	62.9	36.3
机械 规格	线圈总成质量 ± 15%	Mc	kg	1.7		0.5		3.6		2.2
	Dimensions (fig.2)	BxAxH	mm			65x32x41				130x67x43
	永磁体总成质量 ± 15%	Mw	kg / m	2.5		2.15		7.5		4.5
品质 因数 与 附加 数据	电气 时间 常数	Te	ms	6.5		4.5		10.3		6.7
	最大 理论 加速度	Amax	g's	11.4		39		17.7		29
	磁性 吸引力	Fa	kN	0.72		0.8		2.4		3.4
	热阻 - 线圈至外部结构	Rth	o C / Watt	2.4				0.99
	最高 允许 线圈 温度	Tmax	o C	130		130		130		130

 

 

 

 

 

 

 

 

 

 

 

 

 

Project	Parameter	Symbol.	Unit	Type of product
				EPI05-015		Infra-LM1		EPI05-050		Infra-LM2
General characteristics	Engine thrust in peak mode	Fp	N	190		190		625		625
	Engine thrust in continuous operation	Fc	N	73		73		276		276
	Motor constant	Km	N / (W ^ 0.5)	13.1		25		32		55
	The power loss in the engine	Pc	W	44		19		106		55
Elekticheskie Features	Execution speed. A1 - low speed, high-A5	\	\	A1	A5	A1	A5	A1	A5	A1	A5
	Current peak mode	Ip	Arms	11	19	11	19	11	19	11	19
	The current in continuous operation	Ic	Arms	3.9	6.7	3.9	6.7	4.4	7.6	4.4	7.6
	Active resistance between the engine	Rm	Ohm LL	1.4	0.47	0.56	0.2	2.6	0.87	1.34	0.5
	Inductive resistance between the engine ± 20%	L	Mh LL	9.1	3	2.5	1	26.7	8.9	9	3
	Back EMF coefficient	Ke	Vpeak / m / s LL	15.4	8.9	15.4	8.9	51.4	29.7	51.4	29.7
	The coefficient efforts	Kf	N / Arms	18.9	10.9	18.9	10.9	62.9	36.3	62.9	36.3
Weight and dimensions	Mass movable part with windings	Mc	kg	1.7		0.5		3.6		2.2
	Overall dimensions (Fig. 2)	BxAxH	mm			65x32x41				130x67x43
	Mass of the fixed part (steel rack with magnets)	Mw	kg / m	2.5		2.15		7.5		4.5
Dynamic and other characteristics	The time constant of electric	Te	ms	6.5		4.5		10.3		6.7
	Acceleration in the peak mode in units of g = 9.81 m / s 2	Amax	g's	11.4		39		17.7		29
	The force of attraction between the movable and fixed parts	Fa	kN	0.72		0.8		2.4		3.4
	The thermal resistance of the motor	Rth	o C / Watt	2.4				0.99
	Class of winding insulation for heat resistance	Tmax	o C	130		130		130		130

 

 

 

 

项目	参数	符号	单位	产品 型号
				EPI05-100		Infra-LM3		EPI05-200		Infra-LM4		Infra-LM4-1 *
额定 性能	峰值 推力	Fp	N	1250		1250		2500		2500		3850
	持续推力(在温度 Tmax 下) 请 参阅 注释 ①	Fc	N	599		599		1255		1255		1935
	电机常数(在 25 ℃ 下)	Km	N / (W ^ 0.5)	49.1		84		73		132		112
	最大 持续 耗散 功率	Pc	W	210		112		418		197		418
电气 规格	绕组 代号	\	\	A1	A5	A1	A5	A1	A5	A1	A5	A1	A5
	峰值 电流	Ip	Arms	11	19	11	19	11	19	11	19	11	19
	持续电流(在温度 Tmax 下)	Ic	Arms	4.8	8.2	4.8	8.2	5	8.6	5	8.6	5	8.6
	电阻(在 25 ℃ ± 10% 下)	Rm	欧姆 LL	4.4	1.5	2.25	0.8	8	2.7	3.65	1.23	8	2.7
	电感 ± 20%	L	MhL-L	52	17.3	14	5	103	34.2	34	12	103	34.2
	反电势常数(在 25 ℃ ± 10% 下)	Ke	Vpeak / m / s LL	103	59.3	103	59.3	206	119	206	119	317	183
	推力常数(在 25 ℃ ± 10% 下)	Kf	N / Arms	126	72.7	126	72.7	252	145	252	145	388	223
机械 规格	线圈总成质量 ± 15%	Mc	kg	6.5		5.4		12.3		11.8		12.3
	Dimensions	BxAxH	mm			200x100x45				265x132x54		265x132x57
	永磁体总成质量 ± 15%	Mw	kg / m	12.7		8.5		26.8		12		12
品质 因数 与 附加 数据	电气 时间 常数	Te	ms	11.8		6.2		12.8		9.3		12.8
	最大 理论 加速度	Amax	g's	19.6		23.5		20.7		21.6		31.8
	磁性 吸引力	Fa	kN	4.9		7.9		9.9		14		14
	热阻 - 线圈至外部结构	Rth	o C / Watt	0.5				0.25
	最高 允许 线圈 温度	Tmax	o C	130		130		130		130		130

 

Project	Parameter	Symbol.	Unit	Type of product
				EPI05-100		Infra-LM3		EPI05-200		Infra-LM4		Infra-LM4-1 *
General characteristics	Engine thrust in peak mode	Fp	N	1250		1250		2500		2500		3850
	Engine thrust in continuous operation	Fc	N	599		599		1255		1255		1935
	Motor constant	Km	N / (W ^ 0.5)	49.1		84		73		132		112
	The power loss in the engine	Pc	W	210		112		418		197		418
Elekticheskie Features	Execution speed. A1 - low speed, high-A5	\	\	A1	A5	A1	A5	A1	A5	A1	A5	A1	A5
	Current peak mode	Ip	Arms	11	19	11	19	11	19	11	19	11	19
	The current in continuous operation	Ic	Arms	4.8	8.2	4.8	8.2	5	8.6	5	8.6	5	8.6
	Active resistance between the engine	Rm	欧姆 LL	4.4	1.5	2.25	0.8	8	2.7	3.65	1.23	8	2.7
	Inductive resistance between the engine ± 20%	L	MhL-L	52	17.3	14	5	103	34.2	34	12	103	34.2
	Back EMF coefficient	Ke	Vpeak / m / s LL	103	59.3	103	59.3	206	119	206	119	317	183
	The coefficient efforts	Kf	N / Arms	126	72.7	126	72.7	252	145	252	145	388	223
Weight and dimensions	Mass movable part with windings	Mc	kg	6.5		5.4		12.3		11.8		12.3
	Overall dimensions (Fig. 2)	BxAxH	mm			200x100x45				265x132x54		265x132x57
	Mass of the fixed part (steel rack with magnets)	Mw	kg / m	12.7		8.5		26.8		12		12
Dynamic and other characteristics	The time constant of electric	Te	ms	11.8		6.2		12.8		9.3		12.8
	Acceleration in the peak mode in units of g = 9.81 m / s 2	Amax	g's	19.6		23.5		20.7		21.6		31.8
	The force of attraction between the movable and fixed parts	Fa	kN	4.9		7.9		9.9		14		14
	The thermal resistance of the motor	Rth	o C / Watt	0.5				0.25
	Class of winding insulation for heat resistance	Tmax	o C	130		130		130		130		130

* - Execution Engine optimum by maximum traction at par with analog power loss and weight of the moving part.

        A granular joint development and production of this type of engines and equipment on them. For more information and to their proposals to goto  contacts . 

Return to [ page design ] [ home page ]