поискавой системы для электроныых деталей |
|
DRV10974 датащи(PDF) 16 Page - Texas Instruments |
|
|
DRV10974 датащи(HTML) 16 Page - Texas Instruments |
16 / 29 page Power On Calibration Align Accelerate Coasting Closed Loop Wait t(LOCK_OFF) Closed Loop Lock Detect Open Loop 16 DRV10974 SLVSDN2 – JANUARY 2018 www.ti.com Product Folder Links: DRV10974 Submit Documentation Feedback Copyright © 2018, Texas Instruments Incorporated 7.3.7 Overtemperature Protection The DRV10974 device has a thermal shutdown function which disables the motor operation when the device junction temperature has exceeded the TSD temperature. Motor operation resumes when the junction temperature becomes lower than TSD – TSD(hys). 7.3.8 Undervoltage Protection The DRV10974 device has an undervoltage lockout feature, which prevents motor operation whenever the supply voltage (VCC) becomes too low. Upon power up, the DRV10974 device operates when VCC rises above V(UVLO_F) + Vhys(UVLO). The DRV10974 device continues to operate until VCC falls below V(UVLO_F). 7.4 Device Functional Modes 7.4.1 Spin-Up Settings 7.4.1.1 Motor Start The DRV10974 device starts the motor using a procedure which is shown in Figure 14. Figure 14. DRV10974 Initialization and Motor Start-Up Sequence 7.4.1.2 Align To align the rotor to the commutation logic, the DRV10974 device applies a current equivalent to the closed-loop run current to phase U by driving phases V and W equally . This condition is maintained for a maximum of 0.67 s. To avoid a sudden change in current that could result in undesirable acoustics, the applied current is applied gradually to the motor at a rate of 1.2 A / 100 ms. 7.4.2 Open-Loop Acceleration After the motor is confirmed to be stationary and after completing the motor initialization, the DRV10974 device begins to accelerate the motor. This acceleration is accomplished by applying a voltage to the motor at the appropriate drive state and increasing the rate of commutation without regard to the actual position of the motor (referred to as open-loop operation). The function of the open-loop operation is to drive the motor to a minimum speed so that the motor generates sufficient BEMF to allow the commutation control logic to drive the motor accurately. The motor startup profile can be configured using an external resistor to set the acceleration profile before transitioning to closed-loop operation. Figure 15 shows this acceleration profile. During closed loop operation the RMP pin controls the closed-loop acceleration and deceleration.Table 2 lists the selectable acceleration parameters. |
Аналогичный номер детали - DRV10974 |
|
Аналогичное описание - DRV10974 |
|
|
ссылки URL |
Конфиденциальность |
ALLDATASHEETRU.COM |
Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |