lutch and Brake s B s This compact precision motor is equipped with an internal clutch and brake for use with a gearhead. The combination makes it the ideal motor for uses involving frequent START/STOP operation, positioning, indexing, jogging and incremental feeding. Gearhead shown in the photograph is sold separately. SAFETY STD. GEAR LOAD HOLD A INPUT Product Number ode B I 4-7 W U U: With capacitor for V/V Features Suitable for high-frequency operation The high-frequency and high-response clutch and brake enables frequent starting and stopping. ompact and easy to handle The compact design simplifies handling and enables the drive unit of the machine to be mounted into a small area. Highly reliable gearhead employed G- type and GH- type gearheads are specifically designed for B motors and boast excellent impact resistance, greater strength and high reliability. Quick response time The B motor is designed so that it runs continuously. This gives the advantage of a quicker response time and a higher torque in order to move the load. The output shaft is controlled through the use of the clutch and brake mechanism. The load is stopped by disengaging the clutch and applying the brake. The motor is always affected by the rotor inertia. However, with a clutch and brake unit, the load is not affected by the rotor inertia. For these reasons, B motors boast superior response over other A standard motors, starting and stopping in considerably less time. To meet high-frequency, starting and stopping applications, Oriental uses an induction motor for continuous duty. An induction motor is best suited for uni-directional movements. The B motor is not suitable for frequent bi-directional starting and stopping motion. W: Single-Phase V/ V lutch Brake Type : Excitation type onstruction Shaft Type 7: G- type pinion shaft 8: GH- type pinion shaft Flexible oupling (Sold separately) Page A-26 Gearhead (Sold separately) Output Power 4: 4W 6: 6W 9: 9W lutch and Brake Frame Size : 3.4 in.sq. (9mm sq.) Type I: Induction motor Series: lutch and Brake apacitor and capacitor cap. (Included) Note : The "U" at the end of the part number indicate that the unit includes a capacitor. This letter is not listed on the motor nameplate. A-94 2-2 ORIENTAL MOTOR GENERAL ATALOG
Product Lines To select the appropriate B motor, consult the output power characteristics on page A-98. Frame Size 3.4 in.sq. (9 mm sq.) Output Power HP W /8. /2. /8 4 6 9 Voltage VA Single-Phase / Single-Phase / Single-Phase / BI4-7WU BI6-8WU BI9-8WU IK4GN-AW-B IK6GU-AW-B IK9GU-AW-B Gearhead G KA (Sold separately) GH KA (Sold separately) Note: The G- and GH- type gearheads are designed specifically for use with the B motor. Other type gearheads may not be connected. The motors contain a built-in thermal protector. When a motor overheats for any reason, the thermal protector is opened and the motor stops. When the motor temperature drops, the thermal protector closes and the motor restarts. Be sure to turn the motor off before inspecting. The clutch and brake units is not sold separately from the motor. The "U" at the end of the part number indicate that the unit includes a capacitor. This letter is not listed on the motor nameplate. General Specifications (After rated motor operation under normal ambient temperature and humidity.) Item Insulation Resistance Dielectric Strength Temperature Rise Insulation lass Overheat Protection Ambient Temperature Range Ambient Humidity Specifications MΩ or more when V D is applied between the windings and the frame. Sufficient to withstand.kv at and 6Hz applied between the windings and the frame. 44 F (8 ) or less measured by the resistance change method after rated motor operation with a gearhead. lass B 266 F(3 ) All models have built-in thermal protectors (Automatic return type) Operating temperature, open: 266 F4 F (3 ) close: 79.6 F9 F (82 ) 4 F4 F ( 4 ) 8% maximum (noncondensing) lutch/brake Specifications Frame Size 3.4 in.sq. (9 mm sq.) lutch / Brake lutch Brake Holding Brake Torque oz-in mn m # 28 28 Voltage VD 24 24 Input W (at 68 F (2 )) 8.4 6.2 ycle Rates time/minute Safety Standards and E Marking ( only) Standards ertification Body Standards File No. E Marking UL4 UL47 AN/SA-22.2 No. AN/SA-22.2 No.77 EN69 EN634- EN634- IE634- For installation conditions for EN/IE standards, see Page D-2. s are recognized by UL and certified by VDE. The clutch and brake unit is not UL recognized. Recognized name and certified name are motor model name. UL VDE onform to EN/IE Standards. (EN/IE certifications are scheduled.) E6497 67ÜG Low Voltage Directives 2-2 ORIENTAL MOTOR GENERAL ATALOG A-9
Structure and Operations of B ON OFF ON OFF Speed Time lag t t2 Time lag shaft t2 t Armature attraction time shaft Output Shaft The photograph above shows the structure of the clutch and brake unit. When no 24V D is applied to either the clutch coil or brake coil, the output shaft can be rotated by hand. t4 t t3 t6 t7 Actual braking time Braking time Run When D 24V is applied to the clutch coil, the armature of the clutch coil is drawn against the clutch plate, transmitting motor rotation to the output shaft. lutch Disk Armature Actual junction time Accelation time after junction Junction Time The figure above shows the relationship between the action of the motor shaft and output shaft and the state of excitation of the clutch and brake coils. Blue Blue lutch ON 24V D Rotation lutch and Brake Operation When operation is shifted from holding the load to moving the load, there is a lag of 2 msec. between the time the brake is released and the time voltage is applied to the clutch. This is to prevent the clutch and brake from engaging at the same time. The time required for the clutch/brake output shaft to reach a constant speed after voltage is applied to the clutch is called the junction time (t) and is calculated by adding the following elements: Stop, Load Holding By removing the D 24V from the clutch coil, and, after a certain time lag, applying D 24V to the brake coil, the output shaft will come to a stop. During braking output shaft is released from the motor shaft, so the shaft may be stopped without being influenced by motor inertia. The motor continues to rotate. Armature attraction time t2 The time from application of voltage to the clutch coil until contact of the armature with the clutch plate. Actual junction time t4 The time required after the armature comes in contact with the clutch for the clutch/brake output shaft, accelerated by dynamic friction torque, to engage completely with the motor shaft. Armature Brake Disk Acceleration time after junction t3 The time needed to accelerate back to the required speed if load is applied suddenly to the motor during actual junction time above, causing a temporary drop in speed. Stop lutch and Brake Orange Brake ON Orange 24V D A-96 2-2 ORIENTAL MOTOR GENERAL ATALOG
Braking When operation is shifted from rotation to stopping or holding of a load, a time lag of about 2 msec. is necessary after the clutch is disengaged before voltage is applied to the brake coil. The time required after applying voltage to the brake for the clutch/brake output shaft to actually stop is called the braking time (t7), and is obtained by adding the following elements: Armature attraction time t2 The time from the application of voltage to the clutch coil until contact of the armature with the brake plate. Actual braking time t6 The time from the moment the armature comes in contact with the brake plate until the moment the output shaft comes to a complete stop. The following graphs indicate examples of junction and braking characteristics. Junction haracteristics 8 6Hz, V, V Friction Torque = BI9-8WU G- and GH- Type Gearhead for B s The G- and GH- type gearheads have been specially designed for use with the B motor. Although they look much the same as the GN- and GU- type gearheads, their gearing specifications differ, making them incompatible. Never attempt to connect G- or GH- type gearheads to GN- or GU- type gearing motors, or to combine GN- or GU- type gearheads with a B motor: Permissible overhung load and permissible thrust load for Gand GH- type gearheads may not exceed the limits given in the table below. Gear Ratio Permissible Overhung Load.4 in.(mm) from shaft end.8 in.(2mm) from shaft end GKA 3.6~8.(2) 77.2(3) 3~8 66.(3) 99.2(4) 22.() GHKA 3.6~9 ~8 3~8 88.2(4) 99.2(4) () () 32(6) 4(7) 33.() Enter the gear ratio in the box () within the model number. unit = lb (N) Permissible Thrust Load 7 6Hz Note Junction Time [msec] 6 4 3 When using B motors, a D 24V power supply for the clutch and brake is required in addition to the motor power supply. Transformer capacity on the D power supply should be at least.3 times the rated power consumption of the clutch and brake. (See page A-9.) Do not try to activate clutch and brake simultaneously. When shifting from clutch to brake or vice versa, leave a time lag of at least 2 msec. 2 3 4 [oz-in 2 ].2..7. [ 4 kgm 2 ] Braking haracteristics BI9-8WU..9 6Hz,V,V Friction Torque = Overrun[rotation].8.7.6. Braking time [msec] 4 3 2. 2. 3. 4.. [oz-in 2 ].2..7. [ 4 kgm 2 ] 2-2 ORIENTAL MOTOR GENERAL ATALOG A-97
Output Power haracteristics The most appropriate B motor type may be determined by load torque and load inertia requirements of the motor and gearhead using the output selection charts below. The curves represent the relationship between load torque and load inertia for a minimum of two million starts and stops. The motor should be operated inside the limits of the load torque load inertia curves given. Find the clutch and brake motor best suited for your application as follows: Determine the maximum load torque required at the gearhead output shaft. alculate the reflected load inertia effective at the gearhead output shaft. Plot the values found in and into the graph of the applicable speed. The motor model whose characteristic curve is the closest and above the point you entered is the most suitable motor for your purpose. Speed at Output Shaft: r/min Gear ratio 3.6: at 6 Hz [ -4 kgm 2 ] [lb in 2] 2. 9W 6W 4W Selection Example Required Speed: 3r/min : 2 lb-in : 3 lb-in 2 As an example, the value corresponding to the these operating requirements have been marked in the application graph for 3r/min. The speed indicated is calculated by dividing the motor synchronous speed (8r/min at 6Hz) by the speed reduction ratio. Note that depending on the load, the actual speed may be 2~2% lower than indicated in the graph. Speed at Output Shaft: 3r/min Gear ratio 6: at 6 Hz [ -4 kgm 2 ] [lb in 2] 3 3 3. 9W 6W 4W [ -4 kgm 2 ] [lb in 2] 3 Speed at Output Shaft: 2r/min Gear ratio 9: at 6 Hz. 2 [lb ]... 2 [N m] 9W 6W 4W Speed at Output Shaft: 2r/min Gear ratio : at 6 Hz [ -4 kgm 2 ] [lb in 2] 3 2.2. 3 3 [lb ]...3. 3 [N m] 9W 6W 4W 3..... [lb ] [N m]. [lb ]... [N m] A-98 2-2 ORIENTAL MOTOR GENERAL ATALOG
Speed at Output Shaft: r/min Gear ratio 8: at 6 Hz Speed at Output Shaft: 6r/min Gear ratio 3: at 6 Hz [ -4 kgm 2 ] [lb in 2] 3 2 9W 6W 4W [ -4 kgm 2 ] [lb in 2] 3 9W 6W 4W 3 3.. [lb ]... [N m]. 2 [lb ] 2 [N m] Speed at Output Shaft: r/min Gear ratio 36: at 6 Hz Speed at Output Shaft: 3r/min or slower Gear ratio 6: or greater at 6 Hz [ -4 kgm 2 ] [lb in 2] 3 [ -4 kgm 2 ] [lb in 2] 9 3 9W 6W 4W 3 9W 6W 4W 3 3 3 3 [lb ] [N m]. 3 3 [lb ]. 3 [N m] Note: When using a.b motor at an output shaft speed of less than 3r/min (when using with gearheads of speed reduction ratios greater than 6: at 6Hz), use the output selection chart entitled 3r/min or slower. 2-2 ORIENTAL MOTOR GENERAL ATALOG A-99
B s 4W(/8.HP) 6W(/2.HP) 9W(/8HP) Specifications-ontinuous Rating The gearhead is sold separately. Always use G-, GH- type gearhead with B unit. HP Output Power W Voltage V Frequency Hz urrent A Rated Speed r/min apacitor F BI4-7WU BI6-8WU BI9-8WU /8. /2. /8 4 6 9 Single-Phase V Single-Phase V Single-Phase V Single-Phase V Single-Phase V Single-Phase V 6 6 6.68.67.9..4.44 4 9. 8. 2. Speed Range Gear Ratio 3.6 6 9 8 3 36 6 9 2 8 6Hz 3 2 2 6 3 2 The speed is calculated by dividing the motor s synchronous speed (6 Hz: 8 r/min) by the gear ratio. The actual loaded speed is 2 2% less than the displayed value, depending on the amount of the load. Wiring Diagrams The direction of motor rotation is as viewed from the shaft end of the motor. lutch & Brake Line SW W W Black Red White apacitor B W Varistor Blue lutch D Blue 24V Brake Orange Orange Varistor B hange the direction of motor rotation only after bringing the motor to a stop. If an attempt is made to change the direction of rotation while the motor is rotating, the motor may not reverse or it may change its direction of rotation after some delay. Note: The surge absorber circuit is included with the B motor. lutch and brake coil lead wires are non-polar. Type of Gearhead Type Gearhead Gear Ratio BI4- G KA 3.6, 6, 9,, 8, 3 BI6-, BI9- GH KA 36, 6, 9, 2, 8 Enter the gear ratio in the box () within the gearhead model. A-2 2-2 ORIENTAL MOTOR GENERAL ATALOG
Dimensions Scale/4, Unit inch (mm) BI4-7WU Weight (Mass): 8.4 lb. (3.8 kg) Gearhead GKA Weight (Mass): 3.3 lb. (. kg) 6.7(67) L.26(32).2(3).7 (9).4(.4).DIA..4993DIA. /2" ( 2.7.8) GEARHEAD ASE: 4-.26DIA.( 6.) LUTH BRAKE ASE: 4-M6 P.O.9(23)DEEP 3.DIA.( 89).7 (8).42DIA. ( 36) 4.DIA. 4.7DIA. (4.) MOTOR 3LEADS,2(3)LENGTH UL Style 327, AWG2 L.6(42) G3.6KA8KA L2.36(6) G3KA8KA BRAKE 2LEADS,2(3)LENGTH LUTH 2LEADS,2(3)LENGTH 3.43.4 (99) 22 3' BI6-8WU Weight (Mass): 8.8 lb. (4. kg) Gearhead GHKA Weight (Mass): 3.3 lb. (. kg) 3.43.4 (99) 7.7(82) 2.6(6).(38).28(7).2 (28.8).62DIA. /8".6246DIA. (.87.).7 (8).34DIA. ( 34) GEARHEAD ASE: 4-.26DIA.( 6.) LUTH BRAKE ASE: 4-M6 P.O.9(23)DEEP 4.DIA. 4.7DIA. (4.) MOTOR 3LEADS,2(3)LENGTH UL Style 327, AWG2 Key and Key Slot The key is provided with the GHKA BRAKE 2LEADS,2(3)LENGTH LUTH 2LEADS,2(3)LENGTH 22 3 3.43.4 (99).2.79 (28.8.2).88.2 (4.763.3).6.88.4 (4.763 ).88.2 (4.763.3).39.8. (2.743 ) BI9-8WU Weight (Mass): 9.9 lb. (4.kg) Gearhead GHKA Weight (Mass): 3.3 lb.(. kg) 3.43.4 (99) 7.76(97) 2.6(6).(38).28(7).2 (28.8).62DIA. /8".6246DIA. (.87.).7 (8).34DIA. ( 34) GEARHEAD ASE: 4-.26DIA.( 6.) LUTH BRAKE ASE: 4-M6 P.O.9(23)DEEP 4.DIA. 4.7DIA. (4.) MOTOR 3LEADS,2(3)LENGTH UL Style 327, AWG2 Key and Key Slot The key is provided with the GHKA BRAKE 2LEADS,2(3)LENGTH LUTH 2LEADS,2(3)LENGTH 22 3 3.43.4 (99).2.79 (28.8.2).88.2 (4.763.3).6.88.4 (4.763 ).88.2 (4.763.3).39.8. (2.743 ) 2-2 ORIENTAL MOTOR GENERAL ATALOG A-2
apacitor (included with the B motor) Unit inch (mm) p A.69DIA. ( 4.3).79 (2) B.8(4.) B+.39().39 ().24(6).6(4) A.69DIA ( 4.3).79 (2) B B+.9().28(7).39 ().6(4) R.39().24(6) BI4-7WU BI6-8WU BI9-8WU apacitor H9FAUL H8FAUL H2FAUL Dimensions inch(mm) A B.89.83 (48) (2) 2.28.93 (8) (23.) 228.4 (8) (29).22 (3).46 (37).6 (4) Weight oz (g).4(4) 2.47(7) 3.3(9) No. apacitor cap is provided with the capacitor. A-22 2-2 ORIENTAL MOTOR GENERAL ATALOG