Motor spin up with auxiliary power boost
First Claim
Patent Images
1. An apparatus, comprising:
- a primary power supply;
a rechargeable auxiliary battery power supply configured when fully charged to store a maximum auxiliary power and configured when less-than-fully charged to store an available auxiliary power that is less than the maximum auxiliary power and that varies in relation to the charge state of the auxiliary battery power supply;
a data storage disc;
a motor configured to support the disc in rotation at a steady-state speed suited for transferring digital data with the storage disc;
control circuitry operable to accelerate the motor to the steady state speed by;
energizing the motor with the primary power supply to accelerate the motor;
at a time when the auxiliary battery power supply is less-than-fully charged, determining that the available amount of auxiliary power from the auxiliary battery power supply is more than a predetermined minimum auxiliary power; and
before the motor is accelerated to the steady state speed and because the available auxiliary power is determined to be greater than the minimum auxiliary power, boosting the primary power supply by discharging the auxiliary battery power supply to supplement the primary battery power with the available auxiliary power.
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Accused Products
Abstract
An apparatus and associated method that contemplate spinning up an electric motor to an operational speed by accelerating the motor with a primary power, and before the motor is accelerated to the operational speed, boosting the primary power with an auxiliary power for a predetermined interval.
23 Citations
20 Claims
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1. An apparatus, comprising:
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a primary power supply; a rechargeable auxiliary battery power supply configured when fully charged to store a maximum auxiliary power and configured when less-than-fully charged to store an available auxiliary power that is less than the maximum auxiliary power and that varies in relation to the charge state of the auxiliary battery power supply; a data storage disc; a motor configured to support the disc in rotation at a steady-state speed suited for transferring digital data with the storage disc; control circuitry operable to accelerate the motor to the steady state speed by; energizing the motor with the primary power supply to accelerate the motor; at a time when the auxiliary battery power supply is less-than-fully charged, determining that the available amount of auxiliary power from the auxiliary battery power supply is more than a predetermined minimum auxiliary power; and before the motor is accelerated to the steady state speed and because the available auxiliary power is determined to be greater than the minimum auxiliary power, boosting the primary power supply by discharging the auxiliary battery power supply to supplement the primary battery power with the available auxiliary power. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus, comprising:
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a battery having a present charge state that is less-than-fully charged; a data storage disc; a motor configured to support the disc in rotation at a steady-state speed suited for transferring digital data with the storage disc; and control circuitry configured during acceleration of the motor at a speed below the steady-state speed to determine that a present amount of auxiliary power that is available from the auxiliary battery power supply is more than a predefined minimum auxiliary power, so discharging the auxiliary battery power supply to supplement the primary power from the primary power supply with the present available auxiliary power from the auxiliary battery power supply. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A method, comprising:
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obtaining a data storage device having a primary power supply configured to supply a primary power, a rechargeable auxiliary battery power supply configured when fully charged to store a maximum auxiliary power and configured when less-than-fully charged to store a presently available auxiliary power that is less than the maximum auxiliary power and related to the present charge state of the auxiliary battery power supply, a data storage disc, and a motor configured to support the disc in rotation at a steady-state speed suited for transferring digital data with the storage disc; accelerating the motor from a speed that is less than the steady state speed; at a time when the auxiliary battery power supply has a charge state that is less-than-fully charged, determining that the present amount of available auxiliary power from the auxiliary battery power supply is more than a predetermined minimum auxiliary power; and at a time before the motor is accelerated to the steady-state speed and because it is determined that the present available auxiliary power from the auxiliary battery power supply is greater than the predetermined minimum auxiliary power, then boosting the primary power to the motor by discharging the auxiliary battery power supply. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification