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公开(公告)号：GB2266388A
公开(公告)日：1993-10-27
申请号：GB9307872
申请日：1993-04-16
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , UEDA TETSUO , YONEDA ISAO
Abstract: The head 1 of a disc data store is driven to a target position by energising the motor 2 to produce a first, acceleration phase, a second, constant speed phase and a third, deceleration phase. During the constant speed phase, the speed is monitored to determine whether it is within a predetermined range of speeds. If it is, no drive current is applied to the motor. If it is outside the range, correcting drive current is applied. The purpose is to reduce audible noise and power consumption. The system may be used in a computer.
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公开(公告)号：BR9301406A
公开(公告)日：1993-10-26
申请号：BR9301406
申请日：1993-04-02
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , SHINJOH AKIRA , YONEDA ISAO
Abstract: In an idle state, servo information from all sectors is not used, but the servo information from every other sector or from every three or more sectors is used so that head positioning can be performed with only a minimum amount of servo information. The power to the electric circuitry of a write or read system and a servo system, which is not needed in the idle state, is interrupted, from the arrival of the selected servo information to the arrival of the next selected servo information, by a power control signal generated in accordance with the timing of the sectors. The power consumption can be reduced by the amount corresponding to turning off the circuitry not needed, plus the amount needed for computing for position control.
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公开(公告)号：BR9301407A
公开(公告)日：1993-10-26
申请号：BR9301407
申请日：1993-04-02
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , UEDA TETSUO , YONEDA ISAO
Abstract: The head 1 of a disc data store is driven to a target position by energising the motor 2 to produce a first, acceleration phase, a second, constant speed phase and a third, deceleration phase. During the constant speed phase, the speed is monitored to determine whether it is within a predetermined range of speeds. If it is, no drive current is applied to the motor. If it is outside the range, correcting drive current is applied. The purpose is to reduce audible noise and power consumption. The system may be used in a computer.
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公开(公告)号：GB2266403B
公开(公告)日：1995-08-16
申请号：GB9307916
申请日：1993-04-16
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , SHINJOH AKIRA , YONEDA ISAO
Abstract: In an idle state, servo information from all sectors is not used, but the servo information from every other sector or from every three or more sectors is used so that head positioning can be performed with only a minimum amount of servo information. The power to the electric circuitry of a write or read system and a servo system, which is not needed in the idle state, is interrupted, from the arrival of the selected servo information to the arrival of the next selected servo information, by a power control signal generated in accordance with the timing of the sectors. The power consumption can be reduced by the amount corresponding to turning off the circuitry not needed, plus the amount needed for computing for position control.
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Patent Agency Ranking5.发明专利
公开(公告)号：GB2266388B
公开(公告)日：1995-06-21
申请号：GB9307872
申请日：1993-04-16
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , UEDA TETSUO , YONEDA ISAO
Abstract: The head 1 of a disc data store is driven to a target position by energising the motor 2 to produce a first, acceleration phase, a second, constant speed phase and a third, deceleration phase. During the constant speed phase, the speed is monitored to determine whether it is within a predetermined range of speeds. If it is, no drive current is applied to the motor. If it is outside the range, correcting drive current is applied. The purpose is to reduce audible noise and power consumption. The system may be used in a computer.
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公开(公告)号：GB2266403A
公开(公告)日：1993-10-27
申请号：GB9307916
申请日：1993-04-16
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , SHINJOH AKIRA , YONEDA ISAO
Abstract: In an idle state, servo information from all sectors is not used, but the servo information from every other sector or from every three or more sectors is used so that head positioning can be performed with only a minimum number of the servo information. The power of electric circuitry of a write or read system and a servo system, which is not needed in the idle state is interrupted, from the arrival of the selected servo information to the arrival of the next selected servo information, by a power control signal generated in accordance with timing of the, sectors. The consumption power can be reduced by the amount corresponding to turning off of the circuitry not needed, plus the amount needed for computing for position control.
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公开(公告)号：JPH05303827A
公开(公告)日：1993-11-16
申请号：JP9988992
申请日：1992-04-20
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , UEDA TETSUO , YONEDA ISAO
Abstract: PURPOSE: To reduce a noise during seeking and to reduce power consumption. CONSTITUTION: Whether or not a moving speed of a head 1 is within the prescribed range containing a target speed during form the point of time arriving at the target speed to the point of time of prescribed deceleration start is decided by an MPU 8. As the result of having decided, when decided in the affirmative, a current flowing through a voice coil motor 2 is interrupted by a motor driver 11, and when negatively decided, the current is supplied through the voice coil motor 2 by the motor driver 11.
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公开(公告)号：JPH05298841A
公开(公告)日：1993-11-12
申请号：JP9988892
申请日：1992-04-20
Applicant: IBM
Inventor： YAMAMOTO SATOSHI , YONEDA ISAO , SHINJO AKIRA
Abstract: PURPOSE: To reduce power consumption by thinning out and using servo information at an idle time in a magnetic disk device of a sector servo method head positioning controlling, based on the servo information arranged on respective sectors. CONSTITUTION: In an idle state, the servo information of all the sectors are not used, and the servo information is selected every one sector or two sectors or above, and the head is position controlled only by the irreducible minimum servo information. Then, the power consumption required for calculating position control is reduced, and further, the power source of useless electric circuits in a write-in or read-out system and a servo system are made possible to be turned off. Specifically, when an MPU 35 detects the processing end of the commands of the write-in or the read-out receiving from a host computer 53, sends a parameter showing the idle state to a servo digital data processing circuit 31, when a next command does not arrive at an interface 51 from the computer 53 and generates a power control signal PWPS based on the servo information from the circuit 31.
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公开(公告)号：JPH06165576A
公开(公告)日：1994-06-10
申请号：JP31842592
申请日：1992-11-27
Applicant: IBM
Inventor： ENAMI TAKESHI , YAMAMOTO SATOSHI
Abstract: PURPOSE: To provide a driving circuit of a brushless motor wherein power consumption is small, electromagnetic noise and mechanical noise at the time of motor rotation can be reduced, and mounting area is small. CONSTITUTION: According to the outputs of operational amplifiers 5, 6, 7 detecting counter-electromotive forces of phase coils U, V, W, a soft switching waveform shaping circuit 10 and three differential amplifiers 11 control transistors Q2-Q7 and control currents flowing in the phase coils U, V, W. Voltages at the time of driving the transistors Q3, Q5, Q7 are detected with diodes D1-D3. A comparator 22 so controls a switching transistor Q1 and an applying voltage VC that the detected voltage becomes equal to a specified voltage.
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