CN2563627Y - Computer power management system - Google Patents
Computer power management system Download PDFInfo
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- CN2563627Y CN2563627Y CN 02271972 CN02271972U CN2563627Y CN 2563627 Y CN2563627 Y CN 2563627Y CN 02271972 CN02271972 CN 02271972 CN 02271972 U CN02271972 U CN 02271972U CN 2563627 Y CN2563627 Y CN 2563627Y
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- voltage
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- battery
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Abstract
A computer power management system comprises a hard disc driver and a battery voltage monitor. The monitor shuts down the computer when a power supply voltage is lower than a preset voltage V<L>; when the hard disc driver starts, a motor current is limited through a control circuit, thereby enabling the voltage supplied by the battery to the computer not to be lower than a valve value voltage V<1>; furthermore, through controlling the motor current, the voltage supplied by the battery to the computer is enabled not to be higher than a valve value voltage V<2>, wherein the valve value voltage V<2>is higher than the valve value voltage V<1> which is higher than the preset voltage V<L>. Thus, the hard disc driver motor of the utility model is enabled to maintain a high, reasonable and stable current during startup.
Description
[technical field]
The utility model is about a kind of computer power management system, particularly about the management of the battery life of notebook computer.
[background technology]
The management of battery life is crucial to notebook computer, and large-sized battery is subjected to the restriction of its volume and weight and can not be widely used in notebook computer.Therefore, present developing direction is to make the battery miniaturization, and improves by effective management the working time and the serviceable life of miniaturization battery.
Distinct issues are exactly that computermaker can not directly be managed the maximum computer spare part of power consumption in the notebook computer, as hard disk drive.Nickel-cadmium chargeable battery commonly used is in discharge process, and at first voltage is constant relatively but progressively reduce, and cell voltage can descend fast when reaching a certain discharge critical point.In the computer use, when voltage reaches this discharge critical point, can cause improper the closing of computer burst because of brownout, thereby cause losing of data.Therefore, just must avoid this discharge critical point on the battery discharge curve for making the computer operate as normal, for realizing this purpose, computermaker uses a monitoring voltage control device, make supply voltage when being higher than the electrical voltage point VL of this discharge critical point, carry out a shutoff operation by force, carry out the preservation of computer data simultaneously.
Obviously, if there are enough electric charges to keep the running of computer in the battery, so thisly have duplicity or interim caused the closing of incident is unnecessary, and verified hard disk drive also can cause this situation.
The electric energy maximum that hard disk drive is consumed when starting rotation, usually, when motor begins to rotate, need maximum electric current for overcoming the counter electromotive force motor, and current of electric only is subject to the voltage difference of coil impedance, saturated coefficient of self-induction and control circuit and distribution, this method allows electric rotating machine to reach the rotational speed (particularly in contact start stop mode hard disk drive) of hope in the shortest time, but this can cause current of electric to cause cell voltage to drop to below the voltage monitor rated point too greatly, thereby triggers the shutoff operation by force of computer.
For reducing power consumption, usually when not working, disk is placed on " dormancy " pattern, when needs restart disc driver, produce the surge voltage peak value by changing inside battery resistance, and cause supply voltage to descend rapidly, therefore, like this, cause unnecessary closing easilier even cell voltage can not activate " shut " mode" below dropping to the discharge critical point yet.
Please refer to Fig. 1 to Fig. 3, in disk rotation start-up course, may start computer internal control device (minimizing of battery charge and decrease of temperature all can make internal battery impedance increase) because battery charge is less or operating temperature is low, in addition, the voltage available of battery also can descend with decrease of temperature, the function relation figure of the cell voltage territory velocity of discharge under the different temperatures as shown in Figure 3, this can further reduce voltage available when electric motor starting.
In order to address the above problem, method be to use have low internal driving than macrocell, but the size of this class battery and weight limits its application.Another method is to start with the rotation of avoiding disk by make disc driver be in "on" position always, but this can not reach the prolongation battery purpose in serviceable life again.
[summary of the invention]
The purpose of this utility model provides a kind of computer power management system.
The purpose of this utility model realizes by following technical proposal: the utility model computer power management system, comprise a hard disk drive and a cell voltage watch-dog, and this watch-dog is lower than a predetermined voltage V at supply voltage
LThe time close computer, when hard disk drive starts, can not be lower than threshold voltage V thereby limit the voltage that current of electric makes battery offer computer by a control circuit
1, and the voltage that makes battery offer computer by the control current of electric can not be higher than threshold voltage V
2, V wherein
2＞V
1＞V
LThereby make the utility model disk drive motor in start-up course, keep higher, a rational steady current.
The advantage of the utility model computer power management system is: the utility model computer power management system can avoid the situation of abnormal shutdown to take place, and utilizes the electric current restriction of circuit for controlling motor can make disk start faster when battery charges fully and can not cause damage to motor coil.
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
[description of drawings]
Fig. 1 is the curve map that an inside battery resistance changes with respect to its state of charge.
Fig. 2 is the curve map of a complete rechargeable battery internal resistance with respect to temperature variation.
Fig. 3 is the function relation figure of cell voltage and the velocity of discharge under different temperatures.
Current of electric time history plot when Fig. 4 A is the disk drive electric motor starting of the utility model and prior art.
The voltage time history plot that battery provided when Fig. 4 B was the disk drive electric motor starting of the utility model and prior art.
Fig. 5 is a circuit diagram of the present utility model.
[embodiment]
Fig. 4 is a principles illustrated of the present utility model, shown in Fig. 4 A, when starting, under the situation of not controlling the electric current in the disk drive motor, electric current in the motor can constantly rise to a very high lowest high-current value 27, electric current reduces gradually then, and after motor reached operating rate, current of electric just kept a reduced-current value 28.Shown corresponding cell voltage curve among Fig. 4 B, the voltage of supplying in the battery when electric current reaches mxm. 27 in the motor drops to minimum 26, and this value 26 may be lower than the magnitude of voltage V that computer is closed
L25.The utility model adopts the mode of the electric current of restricted passage motor, shown in Fig. 4 A, and when reaching current value 21, the V of its corresponding voltage value 22
1Be higher than V
L, the electric current in the motor can reduce to rise to up to the magnitude of voltage that battery provides the V of magnitude of voltage 24 gradually then
2, at this moment, the V that the magnitude of voltage that provides up to battery drops to magnitude of voltage 23 is provided the electric current in the motor once more
1, reach operating rate until motor so repeatedly, by the mode of this continuous adjusting current of electric, guarantee that cell voltage can not be lower than V
LSituation under reach the operating rate of motor with the acceleration of maximum.
The utility model circuit diagram as shown in Figure 5, one battery 10 gives a computer 11 power supplies, one is used to drive the electric rotating machine 12 of hard disk, one device U1, it comprises a ML2377 equipment, this device U1 comprises a multiplexer U1A successively, one analog to digital converter U1B, an one digital to analog converter U1C and an operational amplifier U1D, the output voltage of battery 10 offers multiplexer U1A as an input end, the output of multiplexer U1A is as the input of analog to digital converter U1B, and battery 10 provides voltage for multiplexer U1A by a voltage divider, and the output signal of analog to digital converter U1B offers microprocessor U3 by an input/output bus.The output signal of microprocessor U3 offers digital to analog converter U1C by input/output bus, the output signal of digital to analog converter U1C offers operational amplifier U1D as input signal, the output signal of operational amplifier U1D offers electric machine controller U2, and electric machine controller U2 offers electric rotating machine 12 by a three-phase coil.The output of electric machine controller U2 feeds back to multiplexer U1A, and electric machine controller U2 provides a communication signal to microprocessor U3, and microprocessor U3 provides a control signal to electric machine controller U2 simultaneously.
Equipment U1 reads the voltage that offers disk, simultaneously analog voltage signal is offered electric rotating machine 12, whether the signal that microprocessor U3 reads analog to digital converter U1B is lower than V1 with the voltage that the mensuration battery provides, and test result write digital to analog converter U1C, then, digital to analog converter U1C provides data whether to reduce electric current in the electric rotating machine to improve voltage to amplifier U1D with decision.
This electric rotating machine controller 12 comprises the phase-locked loop of the speed of a control electric rotating machine 12, and the sequencer of a control semiconductor switch, and this semiconductor switch is to be used for the coil of electric rotating machine 12 is carried out rectification.
Begin to start at 12 o'clock at electric rotating machine, controller U2 by sequencer by predefined procedure actuating coil successively so that electric rotating machine 12 begin the rotation, if detecting sense of rotation makes mistakes, this sequencer enters a separate procedure so that motor 12 rotates to normal direction, in case electric rotating machine 12 rotates to enough fast speed whether electric rotating machine controller U2 is detected when having counter electromotive force to pass through, the pulse that controller U2 then produces a predetermined sequence comes rectification electric rotating machine 12.
This electric machine controller U2 also comprises a circuit, current order voltage that this circuit sum total transmits from operational amplifier U1D and the Current Control wrong voltage that transmits from motor control loop.
In start-up course, current of electric increases and the voltage reduction of battery 10, and at this moment, processor U3 is by analog to digital converter U1B monitoring cell voltage, when voltage drops to V
1The time, microprocessor instructs digital to analog converter U1C begins to gradually reduce electric moter voltage, thereby reduces current of electric, and the voltage that provides up to battery 10 goes back up to V
1More than, if cell voltage is equal to or greater than V
1The time, computer 11 just can not restarted.
When electric rotating machine 12 speed increase, owing to making current of electric, the increase of counter electromotive force in the electric rotating machine 12 reduces, the voltage that the while battery provides increases, in short time, finish startup in order to make motor, need make motor keep a higher levels of current, when the voltage that provides when battery reached V2, the electric current in the motor began again to increase, and the control method of this current of electric carries out in whole starting process repeatedly.
When cell voltage was higher than V2, microprocessor U3 increased its output voltage with regard to command number weighted-voltage D/A converter U1C, with increase electric rotating machine electric current to a predetermined maximum value, thereby was minimized whole start-up time.
When the approaching discharge of the voltage critical point of battery 10, the utility model electric motor starting time more of the prior art may be long slightly, shown in Fig. 4 B, rotations per minute curve when the utility model technology is used in 50 expressions, the rotations per minute curve when the utility model technology is not used in 52 expressions.But, can avoid the situation of abnormal shutdown to take place by using the utility model.And disk starts and the gross energy that reaches operating rate is only determined by initial rotatory inertia, so prolongs start-up time and can't obviously increase energy consumption, so the energy consumption of total energy consumption of the utility model and existing disc driver is roughly the same.
Another one advantage of the present utility model is to utilize the electric current restriction control of circuit for controlling motor, can make disk start faster when battery charges fully and can not cause damage to motor coil.
The utility model uses a microprocessor based on native system to have following advantage.Set-point V
1, V
2Can dynamically adjust according to specific environment.In addition, should can prevent based on the microprocessor of native system because the disc driver external event causes supply short time voltage impulse disturbances, prevent improper maloperation of closing with the electric rotating machine power-supply control unit, when starting, thereby microprocessor uses a coil to carry out a static test and measures available cell voltage, thereby resets the motor current command value before electric motor starting.
In addition, when using special low-voltage electric rotating machine, high-tension battery can damage motor or cause improper operation, and in the utility model circuit, microprocessor can adjust to a special high voltage mode automatically so that current of electric is adjusted to a value that is fit to.
Claims (5)
1. computer power management system, comprise that mainly one detects the voltage sensor of cell voltage, the current controller that a disk drive motor and is connected to this voltage sensor and this disk drive motor, it is characterized in that: this current controller can be regulated current of electric according to the cell voltage of voltage sensor indication, the electric current of restriction in the motor when cell voltage is lower than first voltage level, and keep cell voltage at second below the voltage level.
2. computer power management system as claimed in claim 1, it is characterized in that: this second voltage level is lower than first voltage level, this system comprises further that also one receives the computer of cell voltage, this computer comprises a voltage monitor, and this watch-dog can cut out counter when cell voltage is lower than second voltage level.
3. computer power management system as claimed in claim 1, it is characterized in that: be the voltage that is lower than first voltage level of response voltage sensor indication, this current controller reduces to a nonzero value to improve cell voltage with current of electric in disk motor accelerator.
4. computer power management system as claimed in claim 3, it is characterized in that: the cell voltage of indicating for response voltage sensor rises to the 3rd voltage level from first voltage level, thereby this current controller increases the acceleration that current of electric increases disk drive motor.
5. computer power management system as claimed in claim 4, it is characterized in that: this current controller comprises that one is connected to the operational amplifier of disk drive motor, this amplifier obtains electric energy and offers disk drive motor from battery, and a microprocessor that is connected to this voltage sensor and this amplifier, this microprocessor is by the supply of electrical energy of amplifier control disc driver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02271972 CN2563627Y (en) | 2002-07-19 | 2002-07-19 | Computer power management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02271972 CN2563627Y (en) | 2002-07-19 | 2002-07-19 | Computer power management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2563627Y true CN2563627Y (en) | 2003-07-30 |
Family
ID=33736736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02271972 Expired - Fee Related CN2563627Y (en) | 2002-07-19 | 2002-07-19 | Computer power management system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2563627Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685413B (en) * | 2008-09-27 | 2012-12-05 | 佛山市顺德区汉达精密电子科技有限公司 | Automatic detection device and method |
-
2002
- 2002-07-19 CN CN 02271972 patent/CN2563627Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685413B (en) * | 2008-09-27 | 2012-12-05 | 佛山市顺德区汉达精密电子科技有限公司 | Automatic detection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030730 Termination date: 20090819 |