BEW(FH) Models

These are compact, high-capacity overexcitation power supplies that can be used in the full range of electromagnetic clutches and brakes of rated voltage 45 V DC/90 V DC/180 V DC.Using these as overexcitation power supplies provides benefits such as longer (roughly double) service lives for electromagnetic clutches and brakes and shorter (roughly halved) armature pull-in times. Using these as weak excitation power supplies provides benefits such as lower power consumption (roughly one-quarter), suppressed heat generation (roughly one-quarter) in the stator (electromagnetic coil), and shorter armature release times.

Specifications

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BEW (FH) Types

[Specifications]

Model			BEW-1FH		BEW-2FH		BEW-4FH
Input voltage	100 V AC	± 10％ 50/60 Hz	●	●
	200 V AC				●	●
	400 V AC						●	●
	Input voltage range		AC80 ～ 130V		AC170 ～ 300V		AC80 ～ 480V
Control method			Overexcitation (full-wave rectified) for 0.5 sec followed by constant excitation (half-wave rectified)
Control method			Overexcitation	Constant excitation	Overexcitation	Constant excitation	Overexcitation	Constant excitation
Output voltage			DC90V	DC45V	DC180V	DC90V	DC360V	DC180V
Output current	When the ambient temperature is 20℃ values in () are for an ambient temperature of 60℃		DC1.6A (DC1.3A) Constant excitation				1.2 A DC (1.0 A DC) Constant excitation
Output capacity	When the ambient temperature is 20℃ values in () are for an ambient temperature of 60℃		72 W (58 W) Constant excitation		144 W (117 W) Constant excitation		216 W (180 W) Constant excitation
Size settings	Purpose for use		Using overexcitation	Using weak excitation	Using overexcitation	Using weak excitation	Using overexcitation	Using weak excitation
	Clutch/brake rated voltage		DC45V	DC90V	DC90V	DC180V	DC180V	DC360V
	●: Applicable	01	●	●	●	●	●
		02	●	●	●	●	●
		03	●	●	●	●	●
		04	●	●	●	●	●
		05	●	●	●	●	●
		06	●	●	●	●	●
		08	●	●	●	●	●
		10	●	●	●	●	●
		12		●	●	●	●
		14		●	●	●	●
		16		●	●	●	●
		18		●	●	●	●
		20		●	●	●	●
		25		●	●	●	●
Applied cutches/brakes	MIKI PULLEY electromagnetic-actuated clutches and brakes Rated voltage DC 45/90/180 V		Spring-actuated brake
Insulating resistance	Between terminal and body		DC 500 V, 100 M Ω with Megger
Insulating resistance	Between terminal and body		2000 V AC, 50 Hz, 1 min.
Usage environment	With no condensation		－20℃ ～＋60℃
Mass	Per product		0.065 kg

[Dimensions]

[Structure]

[Terminals and Functions]

Terminal symbol	Terminal name	Function description
1-2	Power supply input terminal	Connector for a commercial power supply
3-4	Output terminal	Connector for an electromagnetic clutch or brake
5-6	Control terminal	Output is controlled by opening and closing between terminals with a relay or other contact

[Characteristics]

Used as Overexcitation Supplies

BEW(FH) models go through about 0.5 sec of full-wave rectified output and then transition to half-wave rectified output. BEW-FH power supply devices create an overexcitation state by matching their constant excitation voltage to the rated voltage of the electromagnetic clutch/brake to obtain the following effects.
• Longer electromagnetic clutch/brake service life (about double)
• Shorter armature pull-in time (about half) to achieve high frequency operation
• Longer service life (about double)
• Reduced startup interference by combined use of a spring-actuated brake and a motor
Also, the following effects can also be obtained by determining the specifications of the spring-actuated brake under the
assumption that a BEW-FH power supply will be used.
• Higher torque
• Thinner design and lighter weight

Use as a weak excitation power supply

Conversely to the above, matching the overexcitation voltage of the power supply unit to the rated voltage of the electromagnetic clutch and brake produces a weak excitation state after suctioning the armature and generates the below effects.
• Reduced power consumption (by approx. one-fourth)
• Decreased generation of heat (by approx. one-fourth) by the stator (electromagnetic coil)
• Slimmer and more compact